4.4.1: The deposit amounts to 20/100 * R250,000 = R50,000.
4.4.2: The loan balance is R250,000 - R50,000 = R200,000.
4.4.3: The total amount to be paid over 72 months is R304,925.
4.4.4: The monthly installment for the car purchased on hire purchase will be approximately R4,237.01.
4.4.1 The deposit required to purchase the car is calculated as 20% of the car's price, which is R250,000. Therefore, the deposit amounts to 20/100 * R250,000 = R50,000.
4.4.2 After paying the deposit, the loan balance will be the remaining amount to be financed. In this case, the car's price is R250,000, and the deposit is R50,000. Thus, the loan balance is R250,000 - R50,000 = R200,000.
4.4.3 To calculate the total amount to be paid over 72 months, including compound interest, we need to use the formula for compound interest:
A = P(1 + r/n)^(nt)
Where:
A = Total amount to be paid
P = Principal amount (loan balance)
r = Annual interest rate (9.5%)
n = Number of times interest is compounded per year (assuming monthly installments, n = 12)
t = Number of years (72 months / 12 months per year = 6 years)
Plugging in the values, we get:
A = R200,000(1 + 0.095/12)^(12*6)
A = R200,000(1.0079167)^72
A = R304,925
Therefore, the total amount to be paid over 72 months is R304,925.
4.4.4 The monthly installment can be calculated by dividing the total amount to be paid by the number of months:
Monthly installment = Total amount to be paid / Number of months
Monthly installment = R304,925 / 72
Monthly installment ≈ R4,237.01
Hence, the monthly installment for the car purchased on hire purchase will be approximately R4,237.01.
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The difference of the squares of two positive consecutive even integers is 36 . Find the integers. Use the fact that, if x represents an even integer, then x+2 represents the next consecutive even integer.
Let's assume that the first even integer is x. According to the given information, the next consecutive even integer would be x+2.
The difference of the squares of these two consecutive even integers is given as 36. We can set up the equation:
(x+2)^2 - x^2 = 36
Expanding the equation, we have:
x^2 + 4x + 4 - x^2 = 36
Simplifying further, the x^2 terms cancel out:
4x + 4 = 36
Next, we isolate the term with x by subtracting 4 from both sides:
4x = 36 - 4
4x = 32
Now, we divide both sides by 4 to solve for x:
x = 32/4
x = 8
So, the first even integer is 8. To find the next consecutive even integer, we add 2:
8 + 2 = 10
Therefore, the two consecutive even integers that satisfy the given condition are 8 and 10.
To verify our solution, we can calculate the difference of their squares:
(10^2) - (8^2) = 100 - 64 = 36
Indeed, the difference is 36, confirming that our answer is correct.
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The accumulated value is \$ (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.)
The accumulated value for this investment would be $625.74.
The accumulated value is the final amount that an investment or a loan will grow to over a period of time. It is calculated based on the initial investment amount, the interest rate, and the length of time for which the investment is held or the loan is repaid.
To calculate the accumulated value, we can use the formula: A = P(1 + r/n)^(nt), where A is the accumulated value, P is the principal or initial investment amount, r is the annual interest rate, n is the number of times interest is compounded per year, and t is the time in years.
For example, if an initial investment of $500 is made for a period of 5 years at an annual interest rate of 4.5% compounded quarterly, the accumulated value can be calculated as follows:
n = 4 (since interest is compounded quarterly)
r = 0.045 (since the annual interest rate is 4.5%)
t = 5 (since the investment is for a period of 5 years)
A = 500(1 + 0.045/4)^(4*5)
A = 500(1 + 0.01125)^20
A = 500(1.01125)^20
A = 500(1.251482)
A = $625.74
Therefore, the accumulated value for this investment would be $625.74.
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he correlation coefficient for the data is r=1 and α=0.05. Should regression analysis be done? The regression analysis should not be done. 8 The regression analysis should be done. Find the equation of the regression line. Round the coefficients to at least three decimal places, if necessary. y′ =a+bx
a=
b=
Find y′ when x=$3268. Round the answer to at least three decimal places, .
The equation of the regression line is:y′ = -1023.33 + 1.38xTo find y′ when x = $3268, we substitute x = 3268 into the equation:y′ = -1023.33 + 1.38 * 3268 = $9968.18Therefore, y′ when x = $3268 is $9968.18.
Correlation coefficient (r) is a statistical measure that quantifies the relationship between two variables. The possible values of the correlation coefficient range from -1.0 to +1.0. A value of 0 indicates that there is no correlation between the two variables. A positive value indicates a positive correlation, and a negative value indicates a negative correlation.
If r is close to 1 or -1, then the variables have a strong correlation.In the case of this question, the correlation coefficient for the data is r = 1, which indicates that there is a perfect positive correlation between the two variables.
Furthermore, the significance level (α) is 0.05. The regression analysis should be done.To find the equation of the regression line, we need to find the values of a and b. The equation of the regression line is:y′ = a + bxwhere y′ is the predicted value of y for a given x, a is the y-intercept, and b is the slope of the line.The formulas for a and b are:a = y¯ − bx¯where y¯ is the mean of y values and x¯ is the mean of x values,andb = r(sy / sx)where sy is the standard deviation of y values, and sx is the standard deviation of x values.
The given values are:x = 3268y = 10211n = 6x¯ = (2400 + 3600 + 4000 + 4900 + 5100 + 5900) / 6 = 4300y¯ = (8450 + 10400 + 10550 + 12650 + 12100 + 14350) / 6 = 10908.33sx = sqrt(((2400 - 4300)^2 + (3600 - 4300)^2 + (4000 - 4300)^2 + (4900 - 4300)^2 + (5100 - 4300)^2 + (5900 - 4300)^2) / 5) = 1328.09sy = sqrt(((8450 - 10908.33)^2 + (10400 - 10908.33)^2 + (10550 - 10908.33)^2 + (12650 - 10908.33)^2 + (12100 - 10908.33)^2 + (14350 - 10908.33)^2) / 5) = 1835.69b = 1 * (1835.69 / 1328.09) = 1.38a = 10908.33 - 1.38 * 4300 = -1023.33Therefore, the equation of the regression line is:y′ = -1023.33 + 1.38xTo find y′ when x = $3268, we substitute x = 3268 into the equation:y′ = -1023.33 + 1.38 * 3268 = $9968.18Therefore, y′ when x = $3268 is $9968.18.
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semi-annuatiy? The accurtulatied yatue is 5 Mt. Nowak hass contributed $18700 at the end of each year unto an RRSP piying 3es per annum cotnpounded quartedi How much will Me. Nowak have in the Pifise ather 15 years? (Round the firal answer to the riearest cent as needed. Round alt internediate values to six decienal piaces as needed ) How much of the above amount is intlerest? 5 (Rouind the final answer to the nearest cent an needed. Round all interrodiate values to sox decemal places as needed) Determine the accumulated value after 6 years of deposits of $256.00 made at the beginning of every thee months and earning nitrtest at 5%, with the payment und compounding intervals the same The accumulated value is $ (Round the final answer to the nearest cent as needed. Round ali intermedate values to sax decimal places as needois) advance world satisfy the lease it niterest is 36% compounded quartery? The equinalest yearty hoyrnent 51
Therefore, the accumulated value is $275,734.45.
Determine the accumulated value after 6 years of payments of $256.00 made quarterly in advance at a 5% rate with the same compounding intervals as the payments. What is the accumulated value if the interest rate is 36% compounded quarterly, given an equivalent annual rate of return of 51%?
Mr. Nowak contributed $18700 at the end of each year for a total of 15 years. The formula to calculate the future value of an annuity due is:
FVad = PMT × (1 + r/k)n × ((1 + r/k) − 1) × (k/r)
Where:
FVad = Future value of an annuity due
PMT = Payment per period
r = Annual interest rate
k = Number of compounding periods per year (quarterly compounding, so k = 4)
n = Total number of periods 5 Mr. Nowak's contributions amount to $280,500 ($18,700 x 15), and the annual interest rate is 3% compounded quarterly, or 0.75% quarterly (3/4). After 15 years, the accumulated value of the plan will be:
$337,391.09 (($18700 × ((1 + 0.75%) ^ (15 × 4)) × (((1 + 0.75%) ^ (15 × 4)) − 1)) / (0.75%)
Round off intermediate values to six decimal places:
$280,500 × 1.824766 = $511,737.74$337,391.09 − $511,737.74
= −$174,346.65
Mr. Nowak's RRSP plan has a negative interest of $174,346.65. It is important to double-check the calculations to ensure that the correct numbers are utilized.
Accumulated value is the sum of future payments, and the formula for calculating it is:
FV = PV × (1 + r/k)n × (k/r)Where:
FV = Future value
PV = Present value
r = Annual interest rate
k = Number of compounding periods per year (quarterly compounding, so k = 4)
n = Total number of periods6 years at $256 per payment, made quarterly, is a total of 24 payments.
$256 × ((1 + 0.05/4)^24 − 1) / (0.05/4)
= $7,140.07
Interest earned is $7,140.07 − $6,144 = $996.07 ($6,144 is the total amount of payments made, $256 × 24).
The equivalent annual rate is 51%, and the interest is compounded quarterly at 36%.
The effective interest rate for quarterly compounding is:
r = (1 + 0.51)^(1/4) − 1 = 0.10793 or 10.793%.
Applying the formula for the future value of a single amount:
FV = PV × (1 + r/k)n × (k/r)
With an initial payment of $1,000:
FV = 1000 × ((1 + 0.10793/4)^(15 × 4)) × (4/0.10793)
= $275,734.45
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to 4 percent. If Calvin made monthly payments of $220 at the end of each month, how long would it take to pay off his credit card? a. If Calvin made monthly payments of $165 at the end of each month, how long would it take to pay off his credit card? months (Round up to the nearest unit.)
Rounding up to the nearest unit, it would take Calvin approximately 27 months to pay off his credit card with a monthly payment of $165.
To determine how long it would take Calvin to pay off his credit card, we need to consider the monthly payment amount and the interest rate. Let's calculate the time it would take for two different monthly payment amounts: $220 and $165.
a. Monthly payment of $220:
Let's assume the initial balance on Calvin's credit card is $3,000, and the annual interest rate is 4 percent. To calculate the monthly interest rate, we divide the annual interest rate by 12 (number of months in a year):
Monthly interest rate = 4% / 12 = 0.3333%
Now, we can calculate the time it would take to pay off the credit card using the monthly payment of $220 and the monthly interest rate. We'll use a formula for the number of months required to pay off a loan with fixed monthly payments:
n = -(log(1 - (r * P) / A) / log(1 + r))
Where:
n = number of months
r = monthly interest rate (as a decimal)
P = initial balance
A = monthly payment
Plugging in the values:
n = -(log(1 - (0.003333 * 3000) / 220) / log(1 + 0.003333))
Using a calculator, we can find:
n ≈ 15.34
Rounding up to the nearest unit, it would take Calvin approximately 16 months to pay off his credit card with a monthly payment of $220.
b. Monthly payment of $165:
We can repeat the same calculation using a monthly payment of $165:
n = -(log(1 - (0.003333 * 3000) / 165) / log(1 + 0.003333))
Using a calculator, we find:
n ≈ 26.39
Please note that these calculations assume that Calvin does not make any additional charges on his credit card during the repayment period. Additionally, the interest rate and the balance are assumed to remain constant. In practice, these factors may vary and could affect the actual time required to pay off the credit card balance.
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Which of the following can be used as a measure of political instability? Select the option which contains all the correct statements.
i. The number of political parties
ii. Frequency of unexpected government turnovers
iii. Conflicts with neighbouring states
iv. Expected terrorism in the country
Select one:
a.
i, ii, iii
b.
i, ii
c.
ii, iv
d.
ii, iii, iv
e.
All the above statements are correct.
Political instability refers to the vulnerability of a government to collapse either because of conflict or non-performance by government institutions.
The correct option is (d) ii, iii, iv.
A measure of political instability would include all of the following except the number of political parties.The following can be used as a measure of political instability .
Frequency of unexpected government turnoversiii. Conflicts with neighbouring statesiv. Expected terrorism in the country Thus, options ii, iii, iv are correct. Hence, the correct option is (d).
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PLS HELP I NEED AN ANSSWER ASAP ILL GIVE BRAINLIEST
The top right graph could show the arrow's height above the ground over time.
Which graph models the situation?The initial and the final height are both at eye level, which is the reference height, that is, a height of zero.
This means that the beginning and at the end of the graph, it is touching the x-axis, hence either the top right or bottom left graphs are correct.
The trajectory of the arrow is in the format of a concave down parabola, hitting it's maximum height and then coming back down to eye leve.
Hence the top right graph could show the arrow's height above the ground over time.
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Which of the following statements about linear regression is TRUE? Check all that apply.
The variable of interest being predicted is called an independent variable.
It has only one dependent variable.
It answers what should happen questions.
It is a predictive analytics technique.
The relationship between the outcome and input variables is linear.
Multiple regression has two or more independent variables.
The true statements about linear regression are: D) It is a predictive analytics technique. E) The relationship between the outcome and input variables is linear.F) Multiple regression has two or more independent variables. Option D, E, F
D) It is a predictive analytics technique: Linear regression is a widely used predictive modeling technique that aims to predict the value of a dependent variable based on one or more independent variables. It helps in understanding and predicting the relationship between variables.
E) The relationship between the outcome and input variables is linear: Linear regression assumes a linear relationship between the dependent variable and the independent variables. It tries to find the best-fit line that represents this linear relationship.
F) Multiple regression has two or more independent variables: Multiple regression is an extension of linear regression that involves two or more independent variables. It allows for the analysis of how multiple variables jointly influence the dependent variable.
The incorrect statements are:
A) The variable of interest being predicted is called an independent variable: In linear regression, the variable being predicted is called the dependent variable or the outcome variable. The independent variables are the variables used to predict the dependent variable.
B) It has only one dependent variable: Linear regression can have multiple independent variables, but it has only one dependent variable.
C) It answers what should happen questions: Linear regression focuses on understanding the relationship between variables and predicting the value of the dependent variable based on the independent variables. It is not specifically designed to answer "what should happen" questions, but rather "what will happen" questions based on the available data.
In summary, linear regression is a predictive analytics technique used to model the relationship between variables. It assumes a linear relationship between the dependent and independent variables. Multiple regression extends this concept to include multiple independent variables.Option D, E, F
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Use the information given about the angle θ, cotθ=-2, secθ<0,0≤θ<2x, to find the exact values of the following.
(a) sin (2θ), (b) cos (2θ), (c) sin(θ/2) and (d) cos(θ/2)
(a) sin (2θ) = (Type an exact answer, using radicals as needed.)
(b) cos (2θ) = (Type an exact answer, using radicals as needed.)
(c) sin(θ/2) = (Type an exact answer, using radicals as needed.)
(d) cos(θ/2) = (Type an exact answer, using radicals as needed)
The exact values of given expressions are:
(a) sin (2θ) = -4√3/7
(b) cos (2θ) = -1/7
(c) sin(θ/2) = √3/√14
(d) cos(θ/2) = -√11/√14
To find the exact values of sin (2θ), cos (2θ), sin(θ/2), and cos(θ/2) given that cotθ = -2 and secθ < 0, we need to determine the values of θ within the given range of 0 ≤ θ < 2π.
First, we can find the values of sin θ, cos θ, and tan θ using the given information. Since cotθ = -2, we know that tanθ = -1/2. And since secθ < 0, we conclude that cosθ < 0. By using the Pythagorean identity sin²θ + cos²θ = 1, we can substitute the value of cosθ as -√3/2 (since sinθ cannot be negative within the given range). Thus, we find sinθ = 1/2.
Next, we can find sin (2θ) and cos (2θ) using double-angle formulas.
sin (2θ) = 2sinθcosθ = 2(1/2)(-√3/2) = -√3/2
cos (2θ) = cos²θ - sin²θ = (-√3/2)² - (1/2)² = 3/4 - 1/4 = -1/7
To find sin(θ/2) and cos(θ/2), we use half-angle formulas.
sin(θ/2) = ±√((1 - cosθ)/2) = ±√((1 + √3/2)/2) = ±√3/√14
cos(θ/2) = ±√((1 + cosθ)/2) = ±√((1 - √3/2)/2) = ±√11/√14
Since 0 ≤ θ < 2π, we select the positive values for sin(θ/2) and cos(θ/2).
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Jared bought 7 cans of paint. A can of red paint costs $3. 75. A can of red paint costs $2. 75. Jared spent $22 in all. How many cans of red and black paint did he buy?
Jared bought 3 cans of red paint and 4 cans of black paint.
Let's assume Jared bought x cans of red paint and y cans of black paint.
According to the given information, the cost of a can of red paint is $3.75, and the cost of a can of black paint is $2.75.
The total amount spent by Jared is $22. Using this information, we can set up the equation 3.75x + 2.75y = 22 to represent the total cost of the paint cans.
To find the solution, we can solve this equation. By substituting different values of x and y, we find that when x = 3 and y = 4, the equation holds true. Therefore, Jared bought 3 cans of red paint and 4 cans of black paint.
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The radius of a circle is 4 in. Answer the parts below. Make sure that you use the correct units in your answers. If necessary, refer to the list of geometry formulas. (a) Find the exact area of the circle. Write your answer in terms of π. Exact area: (b) Using the ALEKS calculator, approximate the area of the circle. To do the approximation, use the π button on the calculator, and round your answer to the nearest hundredth. Approximate area:
(a) The exact area of the circle with a radius of 4 inches is 16π square inches.
(b) Using the ALEKS calculator, the approximate area of the circle with a radius of 4 inches is 50.27 square inches, rounded to the nearest hundredth.
To find the exact area of a circle, we use the formula A = π[tex]r^2[/tex], where A represents the area and r represents the radius. In this case, the radius is given as 4 inches. Plugging this value into the formula, we get A = π([tex]4^2[/tex]) = 16π square inches. Since the value of π is an irrational number and cannot be expressed as a finite decimal, we leave it in terms of π.
To approximate the area of the circle using the ALEKS calculator, we can use the π button on the calculator to represent the value of π. By substituting the radius value of 4 into the formula, we can calculate the approximate area. After performing the calculation, we round the answer to the nearest hundredth to match the precision of the calculator's display. In this case, the approximate area is 50.27 square inches.
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Una escalera de 3 metros esta apoyada en una pared ¿que angulo forma la escalera con el suelo si su base está a 1.2 metros?
The ladder forms an angle of approximately 56.31 degrees with the ground.
To determine the angle formed by the ladder with the ground, we can use trigonometric ratios. In this case, we will use the tangent function.
Let's consider the right triangle formed by the ladder, the wall, and the ground. The length of the ladder represents the hypotenuse, the distance from the wall to the base of the ladder represents the adjacent side, and the distance from the base of the ladder to the ground represents the opposite side.
Given that the ladder is 3 meters long and its base is at a distance of 1.2 meters from the wall, we can calculate the angle formed by the ladder with the ground using the tangent function:
tan(theta) = opposite/adjacent
tan(theta) = (distance from base to ground) / (distance from wall to base)
tan(theta) = (3 - 1.2) / 1.2
tan(theta) = 1.8 / 1.2
tan(theta) = 1.5
To find the angle itself (theta), we need to take the arctan (inverse tangent) of 1.5:
theta = arctan(1.5)
theta ≈ 56.31 degrees
As a result, the ladder's angle with the ground is roughly 56.31 degrees.
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Let A and B be events in a sample space S such that P(A)=.8,P(B)=.9, and P(A∩B)=.5. Find: P(A∣B). P(A∣B)=0.56 P(A∣B)=0.58 P(A∣B)=0.24 P(A∣B)=0.76
Therefore, P(A∣B) is approximately equal to 0.5556.
To find P(A∣B), which represents the conditional probability of event A given that event B has occurred, we can use the formula:
Probability is a way to gauge how likely something is to happen. Many things are difficult to forecast with absolute confidence. Using it, we can only make predictions about the likelihood of an event happening, or how likely it is.
P(A∣B) = P(A∩B) / P(B)
Given that P(A∩B) = 0.5 and P(B) = 0.9, we can substitute these values into the formula:
P(A∣B) = 0.5 / 0.9
Simplifying this expression, we get:
P(A∣B) ≈ 0.5556
Therefore, P(A∣B) is approximately equal to 0.5556.
So the correct answer is P(A∣B) = 0.56.
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Shirley Trembley bought a house for $181,400. She put 20% down and obtained a simple interest amortized loan for the balance at 11 3 8 % for 30 years. If Shirley paid 2 points and $3,427.00 in fees, $1,102.70 of which are included in the finance charge, find the APR. (Round your answer to one decimal place.) %?
Amount of the house = $181,400 The down payment = 20% of $181,400 = $36,280
The balance amount = $181,400 - $36,280 = $145,120Rate of interest = 11 3/8% = 11.375%Term of loan = 30 years $3,427.00 in fees, $1,102.70 of which are included in the finance charge.
Formula used to calculate the APR, which is the annual percentage rate isAPR = 2 [i / (1 - n) F ]Wherei = the interest rate per periodn = the number of payments per year F = the feesIn this question, we are given the following data:
i = 11.375 / (12 × 100) = 0.009479166n = 12 × 30 = 360F = $3,427.00 - $1,102.70 = $2,324.30 .
Substituting the values in the formula APR = 2 [0.009479166 / (1 - 360) × 2324.30)]APR = 9.1% (rounded to one decimal place)Therefore, the APR is 9.1%. which are included in the finance charge.
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9. Here are a few advanced options questions.
a. Imagine I have a choice between selling a 25 delta strangle and a 35 delta strangle. Which one would I receive more premium; the sold 25 delta or the sold 35 delta?
b. The 25 delta risk reversal for USDCAD (Canadian dollar per U.S. dollar) is trading at no cost. What does this mean in terms of the market’s perception of future directional movement?
c. Is it possible for the same underlying asset and maturity to have the 35 delta risk reversal trading at 1% and the 10 delta risk reversal at -2%? Why or why not?
a. The sold 35 delta strangle would generally receive more premium compared to the sold 25 delta strangle.
b. A 25 delta risk reversal for USDCAD trading at no cost suggests that the market perceives an equal probability of future directional movement in either direction.
c. It is possible for the same underlying asset and maturity to have the 35 delta risk reversal trading at 1% and the 10 delta risk reversal at -2% based on market conditions and participants' expectations.
a. The delta of an option measures its sensitivity to changes in the underlying asset's price. A higher delta indicates a higher probability of the option being in-the-money. Therefore, the sold 35 delta strangle, which has a higher delta compared to the 25 delta strangle, would generally receive more premium as it carries a higher risk.
b. A 25 delta risk reversal trading at no cost suggests that the implied volatility for call options and put options with the same delta is equal. This implies that market participants perceive an equal probability of the underlying asset moving in either direction, as the cost of protection (via put options) and speculation (via call options) is balanced.
c. It is possible for the same underlying asset and maturity to have different delta risk reversal levels due to market conditions and participants' expectations. Market dynamics, such as supply and demand for options at different strike prices, can impact the pricing of different delta risk reversals. Factors such as market sentiment, volatility expectations, and positioning by market participants can influence the pricing of options at different deltas, leading to varying levels of risk reversal.
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Question 2. [10 Marks] A manuscript is sent to a typing unit to be typed by one of three typists, Typist 1, Typist 2 or Typist 3. The probability distribution of the number of errors for Typist j is Poisson with mean parameter X, for j = 1,2,3. Assume that each of the three typists is equally likely to be asked to do this typing job and let N denote the number of typing errors that are present in the completed job.
(a) Determine the probability mass function of N. Calculate (i) E[N] and (ii) Var(N).
(b) Suppose that there are n typing errors, i.e. N = n. Calculate the probabilities
P[Typist j did the typing | N = n], j = 1,2,3.
(c) Suppose that λ1 <λ2 <λ3. If N typing? Give justification. = 0, which typist is most likely to have done the
(d) Still assuming A1 < A2 < A3, which typist is most likely to have done the typing if N is large? What is the probability that the most likely typist in fact did the typing? What is the limiting value of this probability as n→ [infinity]? Show your calculations.
(a) 1. Probability Mass Function (PMF) of N
Let the given mean parameter be X.
As per the question, it can be concluded that the probability distribution of the number of errors for Typist j is Poisson with mean parameter X, for j=1,2,3. Hence, the probability of occurrence of N errors is as given below:
P(N=n) = (1/3) [Poisson(n; X)]^3 {n = 0, 1, 2,...}
(ii) Mean and Variance of N
The Mean and Variance of N are given by the formulae:
E(N) = X*3
Var(N) = X*3
(b) Probabilities of Typist 1, 2, and 3 doing the typing
Using Bayes' Theorem, we can get the probabilities of Typist 1, 2, and 3 doing the typing, provided that N=n.
Let us use the conditional probability formula to get P(Typist j did the typing | N = n).
P(Typist j did the typing | N = n) = P(N = n | Typist j did the typing) * P(Typist j did the typing) / P(N = n)where, P(N = n) is the probability of n typing errors in the completed job. From the formula derived in part (a), it is clear that this probability can be calculated as follows:P(N = n) = (1/3) [Poisson(n; X)]^3 {n = 0, 1, 2,...}
(c) The most likely Typist for N=0
As per the given question, λ1 < λ2 < λ3. Hence, Typist 1 will have the least mean number of errors, and Typist 3 will have the maximum mean number of errors. When there are no typing errors (i.e. N = 0), it is clear that the most likely Typist to have done the typing is Typist 1 because the probability that the job had no errors will be maximum when done by the Typist 1.
(d) The most likely Typist for N is large
We can use the Central Limit Theorem to estimate the probability that Typist j did the typing if N is large. This is because the distribution of N is approximately normal when N is large, due to the Poisson distribution being approximately normal. The probability of Typist j doing the typing if N is large can be calculated as follows:
P(Typist j did the typing | N = n) = P(N = n | Typist j did the typing) * P(Typist j did the typing) / P(N = n)where P(N = n) is given by the formula derived in part (a). Let us assume that the given value of N is large.
In such cases, we can approximate the Poisson distribution with a normal distribution. This is because the mean and variance of a Poisson distribution are equal. Hence, the distribution of N is approximately normal when N is large. Therefore, we can use the mean and variance obtained in part (a) to get the probability that Typist j did the typing when N is large.
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Write as a single integral in the form a∫bf(x)dx. -6∫2f(x)dx+2∫5f(x)dx− -6∫−3f(x)dx∫f(x)dx.
The given integral can be written as a single integral in the form a∫bf(x)dx as follows: -6∫2f(x)dx+2∫5f(x)dx− -6∫−3f(x)dx∫f(x)dx = -4∫−32f(x)dx
The first step is to combine the three integrals into a single integral. This can be done by adding the integrals together and adding the constant of integration at the end. The constant of integration is necessary because the sum of three integrals is not necessarily equal to the integral of the sum of the three functions.
The next step is to find the limits of integration. The limits of integration are the smallest and largest x-values in the three integrals. In this case, the smallest x-value is -3 and the largest x-value is 2.
The final step is to simplify the integral. The integral can be simplified by combining the constants and using the fact that the integral of a constant function is equal to the constant multiplied by the integral of 1.
-6∫2f(x)dx+2∫5f(x)dx− -6∫−3f(x)dx∫f(x)dx = -4∫−32f(x)dx
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Let k ? R and f(x, y-x2 + y2 + kxy. If you imagine the graph changing as k increases, at what values of k does the shape of the graph change qualitatively? Justify your answer.
The shape of the graph changes qualitatively at k = ± 2 and
[tex]k=\sqrt{(2)[/tex].
The given function is f(x,y) = y-x²+y²+kxy.
The critical points of the function are found by taking the partial derivatives and equating them to zero:
∂f/∂x = -2x + ky = 0
y = 2x/k
∂f/∂y = 2y + kx = 0
y = -kx/2
Substituting y from the first equation into the second equation gives
x = k²x/4, so k² = 4 and k = ± 2.
Therefore, the critical points are (0,0), (2,4), and (-2,4)
We will now examine the critical points to see when the shape of the graph changes qualitatively.
There are two cases to consider:
Case 1: (0,0)At (0,0), the Hessian matrix is
H = [∂²f/∂x² ∂²f/∂x∂y;∂²f/∂y∂x ∂²f/∂y²]
=[ -2 0;0 2].
The determinant of the Hessian matrix is -4, which is negative.
Therefore, (0,0) is a saddle point and the graph changes qualitatively as k increases for all values of k.
Case 2: (±2,4)At (2,4) and (-2,4), the Hessian matrix is
H = [∂²f/∂x² ∂²f/∂x∂y;∂²f/∂y∂x ∂²f/∂y²]
=[ -2k 2k;2k 2].
The determinant of the Hessian matrix is 4k²+8, which is positive when k is greater than √(2).
Therefore, the critical points (2,4) and (-2,4) are local minima when
k > √(2).
Thus, the shape of the graph changes qualitatively at k = ± 2 and
k = √(2).
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Suppose we have an initial value problem y
′
=f(x,y) with y(0.58)=y
0
. Further suppose that we use Euler's method with a step size h=0.0025000 to find an approximation of the solution to that initial value problem when x=0.6125. In other words we approximate the value of y(0.6125). If we happen to know that the 2
nd
derivitave of the solution satisfies ∣y
′′
(x)∣≤1.4368 whenever 0.58≤x≤0.6125, then what is the worst case we can expect for the theoretical error of the approximation? ∣e
13
∣≤ Find the smallest value possible, given the information you have. Your answer must be accurate to 6 decimal digits (i.e., ∣ your answer − correct answer ∣≤0.0000005 ). Note: this is different to rounding to 6 decimal places You should maintain at least eight decimal digits of precision throughout all calculations.
Given the information about the second derivative of the solution and using Euler's method with a step size of h=0.0025000, the worst-case theoretical error of the approximation for y(0.6125) can be determined. The smallest value possible for the theoretical error, with an accuracy of 6 decimal digits, is sought.
To estimate the worst-case theoretical error of the approximation, we can use Euler's method error formula. The error at a specific step can be bounded by h times the maximum absolute value of the second derivative of the solution over the interval. In this case, the interval is from x=0.58 to x=0.6125.
Given that ∣y''(x)∣ ≤ 1.4368 for 0.58 ≤ x ≤ 0.6125, the maximum value of the second derivative over the interval is 1.4368. Therefore, the worst-case theoretical error at step 13 (corresponding to x=0.6125 with a step size of h=0.0025000) can be calculated as ∣e13∣ ≤ h * max|y''(x)| = 0.0025000 * 1.4368 = 0.003592.
To ensure an accuracy of 6 decimal digits, the answer should be accurate to 0.0000005. Comparing this with the calculated error of 0.003592, we can see that the calculated error exceeds the desired accuracy.
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There are 5 courses and 7 languages. Each course is taken note by different language. If Spanish and English are two of 7 languages. How many ways are there to take note so that no consecutive courses will be taken note by Spanish and English?
There are 5 courses and 7 languages. The number of ways to take notes without consecutive courses being noted in Spanish or English is X.
To calculate this, we can use the principle of inclusion-exclusion. We start by considering all possible ways of taking notes without any restrictions. For each course, we have 7 choices of languages. Therefore, without any restrictions, there would be a total of 7^5 = 16,807 possible ways to take notes.
Next, we need to subtract the cases where consecutive courses are taken note in Spanish or English. Let's consider Spanish as an example. If the first course is noted in Spanish, then the second course cannot be noted in Spanish or English. For the second course, we have 5 language choices (excluding Spanish and English). Similarly, for the third course onwards, we also have 5 language choices. Hence, the total number of ways to take notes with consecutive courses in Spanish is 7 * 5^4.
By the same logic, the total number of ways to take notes with consecutive courses in English is also 7 * 5^4.
However, we need to subtract the cases where both Spanish and English have consecutive courses. In this case, the first course can be in either language, but the second course cannot be in either language. So, we have 2 * 5^4 ways to take notes with consecutive courses in both Spanish and English.
Using the principle of inclusion-exclusion, the number of ways to take notes without consecutive courses in Spanish or English is calculated as: X = 7^5 - (7 * 5^4 + 7 * 5^4 - 2 * 5^4)
= 7^5 - 14 * 5^4.
Therefore, there are X ways to take notes without consecutive courses in Spanish and English.
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Find the function F that satisfies the following differential equation and initial conditions. F′′(x)=1,F′(0)=10,F(0)=15 The function is F(x) = ___
To solve the differential equation F′′(x) = 1 with the initial conditions F′(0) = 10 and F(0) = 15, we integrate the equation twice. First, integrating the equation once with respect to x gives us F′(x) = x + C1, where C1 is a constant of integration. Next, integrating again with respect to x gives us F(x) = 1/2x^2 + C1x + C2, where C2 is another constant of integration.
To find the specific values of C1 and C2, we substitute the initial conditions F′(0) = 10 and F(0) = 15 into the equation.
From F′(x) = x + C1, we have F′(0) = 0 + C1 = 10, which implies C1 = 10.
Substituting C1 = 10 into F(x) = 1/2x^2 + C1x + C2 and using F(0) = 15, we have F(0) = 1/2(0)^2 + 10(0) + C2 = 0 + 0 + C2 = C2 = 15.
Therefore, the function F(x) that satisfies the given differential equation and initial conditions is F(x) = 1/2x^2 + 10x + 15.
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Ist Floor Initial Cost = $800,000 + 12% of $800,000 = $896,000 Annual Rent = $14,400 + 4% of $14,400 = $14,976 * 10 = $149,760 Annual Operating costs and taxes = $3,000 + 4% of $3,000 = $3,120 * 10 = $31,200 Sale price = $1,500,000 + 1,500,000 * 4% = $1,560,000 Discount Rate = 5% Time Period = 10 years Net Present Value (NPV) is the method of ananlysing an investment based on the present values (values in the year 0) of all the cash flows. P/A = [(1 + i)n - 1]/ i(1 + i)n P/F = 1/ (1 + i)n NPV = - Initial cost - Annual operating cost (P/A, i, n) + Rent (P/A, i, n) + Sale price (P/F, i, n)
NPV = - 896,000 - 31,200 (7.65) + 144,000 (7.65) + 1,560,000 (0.62)
NPV = - 896,000 - 238,680 + 1,101,600 + 967,200
*** In this answer how do you get the (7.65) and the (0.62) ***
An investment based on the present values factors or decimal places mentioned in the original solution 931,575.53.
In the given solution, the values (7.65) and (0.62) appear to be factors used in the present value calculations. Let's break down how these factors are derived:
The factor (7.65) is used in the calculation of the present value of the annual operating costs and taxes. The formula used is P/A, where:
P/A = [(1 + i)²n - 1] / [i(1 + i)²n]
Here, i represents the discount rate (5%) and n represents the time period (10 years). Plugging in these values:
P/A = [(1 + 0.05)²10 - 1] / [0.05(1 + 0.05)²10]
= (1.6288950 - 1) / (0.05 ×1.6288950)
≈ 0.6288950 / 0.08144475
≈ 7.717209
The factor (0.62) is used in the calculation of the present value of the sale price. The formula used is P/F, where:
P/F = 1 / (1 + i)²n
Plugging in the values:
P/F = 1 / (1 + 0.05)²10
= 1 / 1.6288950
≈ 0.6143720
Therefore, the correct calculations should be:
NPV = -896,000 - 31,200 (7.717209) + 144,000 (7.717209) + 1,560,000 (0.6143720)
= -896,000 - 241,790.79 + 1,111,588.08 + 957,778.24
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Compute the Laplace transform of g(t). L{g} = Determine £¹{F}. 1 F(s) = 6s² - 13s +6 s(s - 3)(s - 6)
The Laplace transform of g(t), denoted as L{g}, is determined to be £¹{F} = 6/s² - 13/s + 6/(s - 3) - 6/(s - 6).
To find the Laplace transform of g(t), we can use the property that the Laplace transform is a linear operator. We break down the expression F(s) into partial fractions to simplify the calculation.
Given F(s) = 6s² - 13s + 6 / s(s - 3)(s - 6), we can express it as:
F(s) = A/s + B/(s - 3) + C/(s - 6)
To determine the values of A, B, and C, we can use the method of partial fractions. By finding a common denominator and comparing coefficients, we can solve for A, B, and C.
Multiplying through by the common denominator (s(s - 3)(s - 6)), we obtain:
6s² - 13s + 6 = A(s - 3)(s - 6) + B(s)(s - 6) + C(s)(s - 3)
Expanding and simplifying the equation, we find:
6s² - 13s + 6 = (A + B + C)s² - (9A + 6B + 3C)s + 18A
By comparing coefficients, we get the following equations:
A + B + C = 6
9A + 6B + 3C = -13
18A = 6
Solving these equations, we find A = 1/3, B = -1, and C = 4/3.
Substituting these values back into the partial fraction decomposition, we have:
F(s) = 1/3s - 1/(s - 3) + 4/3(s - 6)
Finally, applying the linearity property of the Laplace transform, we can transform each term separately:
L{g} = 1/3 * L{1} - L{1/(s - 3)} + 4/3 * L{1/(s - 6)}
Using the standard Laplace transforms, we obtain:
L{g} = 1/3s - e^(3t) + 4/3e^(6t)
Thus, the Laplace transform of g(t), denoted as L{g}, is £¹{F} = 6/s² - 13/s + 6/(s - 3) - 6/(s - 6).
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Let {N(t),t≥0} be a Poisson process with rate λ. For sN(s)}. P{N(s)=0,N(t)=3}. E[N(t)∣N(s)=4]. E[N(s)∣N(t)=4].
A Poisson process with rate λ, denoted as {N(t), t ≥ 0}, represents a counting process that models the occurrence of events in continuous time.
Here, we will consider two scenarios involving the Poisson process:
P{N(s) = 0, N(t) = 3}: This represents the probability that there are no events at time s and exactly three events at time t. For a Poisson process, the number of events in disjoint time intervals follows independent Poisson distributions. Hence, the probability can be calculated as P{N(s) = 0} * P{N(t-s) = 3}, where P{N(t) = k} is given by the Poisson probability mass function with parameter λt.
E[N(t)|N(s) = 4] and E[N(s)|N(t) = 4]: These conditional expectations represent the expected number of events at time t, given that there are 4 events at time s, and the expected number of events at time s, given that there are 4 events at time t, respectively. In a Poisson process, the number of events in disjoint time intervals is independent. Thus, both expectations are equal to 4.
By understanding the properties of the Poisson process and using appropriate calculations, we can determine probabilities and expectations in different scenarios involving the process.
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Find the equation of a hyperbola with center at (0,0), focus at (4,0), and vertex at (2,0). Graph the hyperbola.
The equation of the hyperbola with center at (0,0), focus at (4,0), and vertex at (2,0) is: [tex]x^2/1 - y^2/3 = 1[/tex].
A hyperbola is a type of conic section that has two branches and is defined by its center, foci, and vertices. In this case, the center of the hyperbola is given as (0,0), which means that the origin is at the center of the coordinate system. The focus is located at (4,0), which means that the hyperbola is horizontally oriented. The vertex is at (2,0), which is the point where the hyperbola intersects its transverse axis.
To find the equation of the hyperbola, we need to determine the distance between the center and the focus, which is the value of c. In this case, c = 4 units. The distance between the center and the vertex, which is the value of a, is 2 units.
The general equation for a hyperbola centered at the origin is:
x²/a² - y²/b² = 1
Since the hyperbola is horizontally oriented, a is the distance between the center and the vertex along the x-axis. In this case, a = 2 units. The value of b can be determined using the relationship between a, b, and c in a hyperbola: c² = a² + b². Substituting the known values, we get:
16 = 4 + b²
b^2 = 12
Thus, the equation of the hyperbola is:
x²/4 - y²/12 = 1
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The area of a container is 3.01×10^6cm^2. What would the area of the container be in m^2? ENTER NUMERIC VALUE ONLY USING 3 SIG FIGS .. NO UNITS OR SCIENTIFIC NOTATION! Question 8 2 pts The volume of a container is 2.73×10^−7m^3. What would the volume of the container be in mm^3? ENTER NUMERIC VALUE ONLY USING 3 SIG FIGS - NO UNITS OR SCIENTIFIC NOTATION!
The area of the container in m² is 30.1.The volume of the container in mm³ is 27,300.
To convert the area of the container from cm² to m², to divide the given value by 10,000, as there are 10,000 cm² in 1 m².
Area in m² = Area in cm² / 10,000
Area in m² = 3.01 × 10³ cm² / 10,000
= 301 × 10² cm² / 10,000
= 30.1 m²
To convert the volume of the container from m³ to mm³, to multiply the given value by 1,000,000,000, as there are 1,000,000,000 mm³ in 1 m³.
Volume in mm³ = Volume in m³ × 1,000,000,000
Volume in mm³ = 2.73 × 10²(-7) m³ × 1,000,000,000
= 273 × 10²(-7) m³ × 1,000,000,000
= 273 × 10²(-7) × 10³ m³
= 273 × 10²(2) mm³
= 27,300 mm³
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In Romberg integration, \( R_{32} \) is of order: 6 2 4 8
In Romberg integration, the notation \(R_{32}\) refers to the third column and second diagonal entry in the Romberg integration table. The order of \(R_{32}\) is 4, not 6, 2, or 8.
Romberg integration is a numerical method used to approximate definite integrals. It creates an iterative table of approximations by successively refining the estimates based on Richardson extrapolation.
The Romberg integration table is organized into rows and columns, with each entry representing an approximation of the integral. The entries in the diagonal of the table correspond to the highest order of approximation achieved at each step. The order of the approximation is determined by the number of iterations or the number of function evaluations used to compute the entry.
In the case of \(R_{32}\), the subscript represents the row and column indices. The first digit, 3, represents the row index, indicating that it is the third row. The second digit, 2, represents the column index, indicating that it is the second entry in the third row. The order of \(R_{32}\) is determined by the column index, which is 2. Therefore, the order of \(R_{32}\) is 4.
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Elin estimates that her probability of passing French is 0.6 and her probability of passing chemistry is 0.8. Determine the probability that Elin will pass French but fail chemistry. a. 0.08 b. 0.48 c. 0.12 d. 0.32
The probability that Elin will pass French but fail chemistry is 0.12 (option c).
Explanation:
To find the probability that Elin will pass French but fail chemistry, we multiply the probability of passing French (0.6) by the probability of failing chemistry (1 - 0.8 = 0.2) since passing and failing are complementary events.
Probability of passing French = 0.6
Probability of failing chemistry = 1 - Probability of passing chemistry = 1 - 0.8 = 0.2
Probability of passing French but failing chemistry = 0.6 * 0.2 = 0.12
Therefore, the correct answer is option c - 0.12.
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Find all values of x and y such that fx(x,y)=0 and fy(x,y)=0 simultaneously.
f(x,y)=x^2+3xy+y^2−18x−22y+50
(x,y)=(_)
Solving the system of equations fx(x, y) = 0 and fy(x, y) = 0 , we get values x = 6 and y = 2.
To find the values of x and y such that both fx(x, y) = 0 and fy(x, y) = 0 simultaneously, we need to compute the partial derivatives of f(x, y) with respect to x and y, and solve the resulting system of equations.
Taking the partial derivative of f(x, y) with respect to x, we get:
fx(x, y) = 2x + 3y - 18
Taking the partial derivative of f(x, y) with respect to y, we get:
fy(x, y) = 2y + 3x - 22
To find the values of x and y that satisfy both equations, we can set fx(x, y) = 0 and fy(x, y) = 0 simultaneously and solve for x and y.
Setting fx(x, y) = 0:
2x + 3y - 18 = 0 ...(Equation 1)
Setting fy(x, y) = 0:
2y + 3x - 22 = 0 ...(Equation 2)
Solving this system of equations
From Equation 1, we can isolate x in terms of y:
2x = 18 - 3y
x = 9 - (3/2)y ...(Equation 3)
Substituting Equation 3 into Equation 2:
2y + 3(9 - (3/2)y) - 22 = 0
Simplifying this equation, we get:
2y + 27 - (9/2)y - 22 = 0
(4/2)y - (9/2)y + 5 = 0
(-5/2)y + 5 = 0
(-5/2)y = -5
y = 2
Substituting the value of y into Equation 3:
x = 9 - (3/2)(2)
x = 9 - 3
x = 6
Therefore, the solution to the system of equations fx(x, y) = 0 and fy(x, y) = 0 is (x, y) = (6, 2).
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Find the solution set of equations using the Cramer method.
\( 3 x_{1}+4 x_{2}-3 x_{3}=5 \) \( 3 x_{1}-2 x_{2}+4 x_{3}=7 \) \( 3 x_{1}+2 x_{2}-x_{3}=3 \)
According to the given data, the solution set of the given system using Cramer's rule is: (x1, x2, x3) = (-9, 17/3, 1).
The given system of equations is:[tex]$$ \begin{matrix}3x_1+4x_2-3x_3=5\\3x_1-2x_2+4x_3=7\\3x_1+2x_2-x_3=3\end{matrix} $$[/tex]
We need to find the solution set of equations using the Cramer method. Cramer's rule states that if Ax = B be a system of n linear equations in n unknowns with the determinant D ≠ 0, then the system has a unique solution given by x1 = Dx1/D, x2 = Dx2/D, ..., xn = Dxn/D, where Di is the determinant obtained by replacing the ith column of A by the column matrix B. Here A is the coefficient matrix, x is the matrix of unknowns, and B is the matrix of constants. D is called the determinant of A.Let A be the coefficient matrix and B be the matrix of constants. Then the augmented matrix will be [A|B].
Let us find the value of D, Dx1, Dx2, and Dx3, respectively.
[tex]\[\begin{aligned} D&=\begin{vmatrix}3&4&-3\\3&-2&4\\3&2&-1\end{vmatrix}\\&=3\begin{vmatrix}-2&4\\2&-1\end{vmatrix}-4\begin{vmatrix}3&4\\2&-1\end{vmatrix}-3\begin{vmatrix}3&-2\\2&2\end{vmatrix}\\&=3(2-8)+4(3+8)-3(6+4)\\&=3\end{aligned}\][/tex]
Now, let us find the value of Dx1:
[tex]\[\begin{aligned} D_{x_1}&=\begin{vmatrix}5&4&-3\\7&-2&4\\3&2&-1\end{vmatrix}\\&=5\begin{vmatrix}-2&4\\2&-1\end{vmatrix}-4\begin{vmatrix}7&4\\2&-1\end{vmatrix}-3\begin{vmatrix}7&-2\\2&2\end{vmatrix}\\&=5(2-8)-4(7+8)+3(14+2)\\&=-27\end{aligned}\][/tex]
Now, let us find the value of Dx2:
[tex]\[\begin{aligned} D_{x_2}&=\begin{vmatrix}3&5&-3\\3&7&4\\3&3&-1\end{vmatrix}\\&=3\begin{vmatrix}7&4\\3&-1\end{vmatrix}-5\begin{vmatrix}3&4\\3&-1\end{vmatrix}-3\begin{vmatrix}3&5\\3&7\end{vmatrix}\\&=3(7+12)-5(3+12)-3(7-15)\\&=-51\end{aligned}\][/tex]
Now, let us find the value of Dx3:
[tex]\[\begin{aligned} D_{x_3}&=\begin{vmatrix}3&4&5\\3&-2&7\\3&2&3\end{vmatrix}\\&=3\begin{vmatrix}-2&7\\2&3\end{vmatrix}-4\begin{vmatrix}3&7\\2&3\end{vmatrix}+5\begin{vmatrix}3&-2\\2&2\end{vmatrix}\\&=3(-6-14)-4(9-14)+5(6)\\&=-18\end{aligned}\][/tex]
Then, the solution set of the given system is given by:[tex]$$\begin{aligned} x_1&=\dfrac{D_{x_1}}{D}\\&=-9\\ x_2&=\dfrac{D_{x_2}}{D}\\&=17/3\\ x_3&=\dfrac{D_{x_3}}{D}\\&=1 \end{aligned}$$[/tex]
Therefore, the solution set of the given system using Cramer's rule is: (x1, x2, x3) = (-9, 17/3, 1).
Hence, the required solution is (-9, 17/3, 1).
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