Answer:
11/18.
Dan is 8.
Step-by-step explanation:
The initial fraction is
x / 2x-4
Adding 3/3 we have
x+3 / 2x-1 = 2/3
Cross multiply:
3(x+3) = 2(2x-1)
3x + 9 = 4x - 2
9 + 2 = 4x - 3x
11 = x,
So the original fraction was 11 / 2(11) - 4
= 11/18.
If Dans age is d then Lois's age = 4d.
So 4d + d = 40
5d = 40
d = 8.
So Dan is 8 years old.
if a + b is equals to 5 and a x b is equal to 6 then what is the value of a and b
Answer: 2 and 3, or 3 and 2
Step-by-step explanation:
a + b = 5 so a = 5 - b
Substitute a = 5 - b into ab = 6; (5 - b)b = 6
5b - [tex]b^{2}[/tex] = 6
[tex]b^{2}[/tex] - 5b + 6 = 0
(b - 2)(b - 3) = 0
So b is either 2 or 3
So a is either 3 or 2 depending on what b is
x2 + 6x - 7
Factor the following trinomials containing negative numbers. Follow the rules for operations with signed numbers to identify the correct binomial factors.
The factored form of the given trinomial is (x -7)(x +1)
Factoring the quadraticsFrom the question, we are to factor the given trinomials
The given trinomial is
x² + 6x - 7
The trinomial is a quadratic expression. The trinomial/ quadratic expression can be factored as a product of two binomial. When factored, the trinomial will take the form (x + a)(x + b)
Where are a and b are integers.
Factoring the trinomial
x² + 6x - 7
To factor the trinomial, we will find two numbers such that when added, we get the middle term; and when these numbers are multiplied we get the constant term.
The numbers that satisfy this condition are +1x and -7x
x² +x -7x - 7
x (x + 1) -7(x +1)
(x -7)(x +1)
Hence, the factored form of the given trinomial is (x -7)(x +1)
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Please help me asap
a. What is the area of the roof that needs to be covered?
b. How many shingles do you need to buy?
A quantity of 84 shingles are required to cover the surface area of 336 square feet of the first roof.
A quantity of 110 shingles are required to cover the surface area of 220 square feet of the second root.
How many shingles and how many area do we need to cover a root?
In this question we must determine both the surface area and the number of shingles to cover two roof configurations as well. In the first case, we calculate the surface area, which is the sum of the area of rectangles:
A = 2 · (8 ft) · (12 ft) + 2 · (6 ft) · (12 ft)
A = 336 ft²
And the number of shingles required to cover the root is:
n = (336 ft²) / (4 ft²)
n = 84
A quantity of 84 shingles are required to cover the surface area of 336 square feet of the first roof.
In the second, we only need to cover the very top surface. The area and the number of shingles are, respectively:
A = 2 · (5 ft) · (22 ft)
A = 220 ft²
n = (220 ft²) / (2 ft²)
n = 110
A quantity of 110 shingles are required to cover the surface area of 220 square feet of the second root.
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expand and simplify -2(x + 4x^2) + 3(x^2 + 2x)
......................
Find an equation for the conic that satisfies the given conditions. ellipse, foci (±2, 0), vertices (±5, 0)
The equation of the ellipse having foci (±2,0) and vertices (±5,0) is [tex]x^{2} /4+y^{2} /21=1[/tex].
Given the foci of ellipse is (±2,0) and vertices (±5,0).
We are required to find the equation of ellipse having foci (±2,0) and vertices (±5,0).
Equation is the relationship between two or more variables that are expressed in equal to form. Equation of two variables looks like ax+by=c.
Equation of ellipse is as under:
[tex]x^{2} /a^{2} +y^{2} /b^{2} =1[/tex],where a is the semi major axis.
We have been given that a=5, c=2.
We know that [tex]c^{2} =a^{2} -b^{2}[/tex]
We have to find the value of b.
b=[tex]\sqrt{a^{2} -c^{2} }[/tex]
=[tex]\sqrt{5^{2} -2^{2} }[/tex]
=[tex]\sqrt{25-4}[/tex]
=[tex]\sqrt{21}[/tex]
Using the values of a and b in the equation [tex]x^{2} /a^{2} +y^{2} /b^{2} =1[/tex]
[tex]x^{2} /(2)^{2} +y^{2}/\sqrt{21} ^{2} =1[/tex]
[tex]x^{2} /4+y^{2} /21=1[/tex]
Hence the equation of the ellipse having foci (±2,0) and vertices (±5,0) is [tex]x^{2} /4+y^{2} /21=1[/tex].
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Solve the equation
-18 + 24 = -2(x+6)
Answer:
x = -9
Step-by-step explanation:
-18+24 = -2(x+6) Distribute and simplify
6 = -2x-12 Add 12 to both sides
18 = -2x Divide by -2 on both sides
-9 = x Here's your answer
Hope this helps! :D
First, do -2 times x. that is -2x. Next, do -2 times +6. That should be -12. The last steps are in order, add 18 on both sides. it should be -18+18 and -12+18. now you have 24 on the left and -2x and +6. -6 on both sides. 6-6 and 24-6. now you have 18 and -2x. so get rid of the -2x by doing -2x/-2 and on the left side 18/-2. So the answer should be -9=x.
Which angle refers to the same angle as \angle BPF∠BPFangle, B, P, F?
A vertically opposite angle is a pair of angles formed due to the intersection of two lines, and are said to be equal. Thus the angle that is the same as <BPD is <APC.
ii. The value of x is [tex]47^{o}[/tex].
The intersection of two or more lines at a point will always produce a set of angles. Some of these angles when compared may have similar measures or properties.
Two angles can be equal with respect to their measure if they are vertically opposite. Vertically opposite angles are angles formed when two lines intersect, such that a pair of opposite angles about the point of intersection are equal.
Thus from the given question, the angle that is the same as <PBD is <APC.
i.e <BPD ≅ <APC (vertically opposite property)
Also,
x + 133 = 180 (sum of angles on a straight line)
x = 180 - 133
= 47
x = [tex]47^{o}[/tex]
Therefore the value of x is [tex]47^{o}[/tex].
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Which car has "best" car combination of mpg and hp, where mpg and hp must be given equal weight?
The mpg and hp is print(paste("The car with the best combination of mpg and hp is",rownames(myCars[myCars$combination==max(myCars$combination),])))
MPG is an abbreviation for 'miles-consistent with gallon and it is used to give you an indication of the fuel financial system of a vehicle or industrial vehicle. It helps you to work out how reasonably-priced or high-priced an automobile might be to run.
As for a new vehicle, an awesome MPG is around 50 to 60. Having this stepped forward gasoline economy facilitates minimizing going for walks fees and cheaper avenue tax due to decreased CO2 emissions. consistent with What car's featured blog, here are a number of the most gasoline-green automobiles in the marketplace nowadays.
The gas economic system of a car relates to the space traveled via an automobile and the quantity of fuel fed on. intake can be expressed in terms of the volume of gasoline to travel a distance, or the gap traveled according to the unit quantity of gasoline consumed.
The car has the “best” combination of mpg and hp, where mpg and hp must be given equal weight.
#sum the scaled values of mpg and hp and add a new column called combination
myCars$combination<-scale(myCars$hp)+scale(myCars$mpg)
#Which car has the best combination of mpg and hp?
print(paste("The car with the best combination of mpg and hp is",rownames(myCars[myCars$combination==max(myCars$combination),])))
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5x-2y=10
4y+20=10x
Solving systemd
Answer:
The answer is x=2 and y=0.
Step-by-step explanation:
The given Equations are:
5x-2y=10 ----------------- (i)
4y+20=10x ----------------- (ii)
From equation find the value of x, that is:
5x=10+2y (Obtained By adding 2y on both side of Equation (i))
Next divide with 5 on both side to get x:
x=(10+2y)/5 ------------------ (iii)
Put this value of x in equation (ii):
4y+20=10((10+2y)/5)
Simplifying the above equation:
4y+20=2(10+2y)
4y+20=20+4y
From the above equation the solution of y is not possible.
We can make it 0. So,
y=0
Put this value of y in equation (iii), to get value of x:
x=(10+2(0))/5
x=(10+0)/5
x=10/5
x=2
The height of water shooting my fountain is modeled by the function f(x)= -4x^2 +24x -29 where x the distance from the spout in feet. Complete the square to determine the maximum height of the path of the water.
By the use of the completing the square method, the maximum height is 3 ±√29/4 + 9 m.
What is the maximum height of the water?The maximum height has been modeled by the use of the equation f(x)= -4x^2 +24x -29. Now we know that f(x)= h so we can write;
h = -4x^2 +24x -29
Now we have;
0 = -4x^2 +24x -29
-4x^2 +24x -29= 0
x^2 - 6x = -29/4
(x - 3)^2 = -29/4 + 3^2
(x - 3)^2 = -29/4 + 9
x = 3 ±√29/4 + 9 m
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The sum of five consecutive positive integers is 2020. Find the largets of these numbers.
The largest integers of the numbers is 406.
How to find the five consecutive positive integers?The sum of five consecutive positive integers is 2020.
Therefore,
let
the first positive integer = x
Hence,
x + x + 1 + x + 2 + x + 3 + x + 4 = 2020
5x + 10 = 2020
5x = 2020 - 10
5x = 2010
x = 2010 / 5
x = 402
largest integer = 402 + 4 = 406
Therefore, the largest integers of the numbers is 406.
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i need to make a stem and leaf plot for the numbers given below on number 6
Answer:
See the plot below
=========================
Given data420, 369, 375, 382, 410, 376, 397, 411, 356, 387, 355, 373We need to make a stem and leaf plot
Step 1Rearrange the data in the ascending order:
355, 356, 369, 373, 375, 376, 382, 387, 397, 410, 411, 420Step 2Group the data as follows:
355, 356369373, 375, 376382, 387397410, 411420Step 3The first two digits form a stem and the last digits form a leaf.
Make a plot:
Stem | Leaf
35 | 5 636 | 937 | 3 5 638 | 2 739 | 741 | 0 142 | 0Lauren describes a parabola where the focus has a positive, nonzero x coordinate. Which parabola(s) could Lauren be describing? Check all that apply.
x2 = 4y
x2 = –6y
y2 = x
y2 = 10x
y2 = –3x
y2 = 5x
Parabolas could Lauren be describing are:
c) y2 = x
d) y2 = 10x
F) y2 = 5x
What exactly is a parabolic curve?The intersection of a cone with a plane that is parallel to the side of the cone results in the formation of a parabola, which is a symmetrical open plane curve. Under the influence of gravity, the route taken by a projectile takes the form of a curve similar to this one.
In the question that is presented to her, Lauren gives an example of a parabola that has a positive non-zero coordinate value on focus
Generally, the equation for focus is mathematically given as
y=a(x-h)^2+k
In conclusion
c) y2 = xd) y2 = 10xF) y2 = 5xRead more about Parabola
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Find the length of CB.
5x – 3
3x + 1
Assumed that sides are equal
5x-3=3x+15x-3x=1+32x=4x=2CB
5(2)-37What expression represents the volume of the prism, in cubic units? one-halfx3 one-halfx2 x 2x3 2x2 x
Volume of prism = [tex]\frac{1}{2x^{3} } + x^{2}[/tex]
Given that:
The oblique prism below has an isosceles right triangle base and the length of the base is x
=> the area of the base: [tex]\frac{1}{2}[/tex] × x × x = [tex]\frac{1}{2}[/tex]
The vertical height of the prism is (x + 2)
=> The volume of the oblique prism is:
V = the base area * the vertical height
<=> V = [tex]\frac{1}{2}[/tex] [tex]x^{2}[/tex] (x + 2)
<=> V = [tex]\frac{1}{2x^{3} } + x^{2}[/tex]
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Choose the system for the graph.
y 2 2x+2
y2-x
A.
B.
C.
D.
≤ 2x - 1
yz -x + 2
y≤-2x + 2
(y 2 x
ys 2x + 2
y >- 1x
Answer:
[tex]\textsf{D.} \quad \begin{cases} y \leq 2x+2 \\ y\geq -\dfrac{1}{2}x \end{cases}[/tex]
Step-by-step explanation:
Both lines in the given system of inequalities are linear equations.
Slope-intercept form of a linear equation: y = mx + b
(where m is the slope and b is the y-intercept)
Positive slope (m): as x increases, y increases.
Negative slope (-m): as x increases, y decreases.
When graphing inequalities:
< or > : dashed lines≤ or ≥ : solid line< or ≤ : shading under the line> or ≥ : shading above the lineThe inequality represented by the blue line has a positive slope and shading below the line.
⇒ y ≤ mx + b
From inspection of the graph, its y-intercept is 2.
⇒ y ≤ mx + 2
The inequality represented by the yellow line has a negative slope and shading above the line.
⇒ y ≥ -mx + b
From inspection of the graph, it's y-intercept is zero.
⇒ y ≥ -mx
The only pair of inequalities that satisfies the above conditions is:
[tex]\textsf{D.} \quad \begin{cases} y \leq 2x+2 \\ y\geq -\dfrac{1}{2}x \end{cases}[/tex]
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The SkyWheel has 42 glass enclosed gondolas. What is the measure of each central angle between gondola cars, to the nearest hundredth degree? (just write the numerical answer, no units) (5 points)
Answer:
8.57.
Step-by-step explanation:
that would be 360/42
= 8.5714
Anna wanted to buy a camera. The first discount store sold her favorite camera for $95. The second store sold the same camera for $115, but it was on sale for 20% off. The third store carried the camera for $105 but offered it at 10% off with a coupon. which store had the better buy?
The second store offered the better buy at the price of $92.00.
What is better buy?
Better buy refers to the lowest price out of the prices offered by the three stores.
In order to determine the lowest price, the no discount price of the first store needs to be compared to the prices of two other stores, bearing that after-discount price is the pre-discount price multiplied by 1 minus the discount rate.
First store price=$95.00
Second store after-discount price=pre-tax discount price*(1-discount rate)
pre-discount price=$115
discount rate=20%
Second store after-discount price=$115*(1-20%)
Second store after-discount price=$92.00
Third store after-discount price=pre-tax discount price*(1-discount rate)
pre-discount price=$105
discount rate=10%
Third store after-discount price=$105*(1-10%)
Third store after-discount price=$94.50
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Given below are lease terms at the local dealership. What is the total cash
due at signing?
Based on the various costs resulting from the lease terms at the local dealership, the total cash to pay at signing is $5,480
What is the total cash?This can be found by the formula:
= Down payment + Monthly payment + Security deposit + Acquisition fee
Solving gives:
= 4,100 + 475 + 415 + 490
= $5,480
In conclusion, option A is correct.
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Answer: B. $5005
Step-by-step explanation:
A company, ABC, wants to produce Graphing Calculators. The equipment rental costs are $150 per month and the parts for the calculators cost $1.50 per calculator.
a. Create a function that models this situation:
The total cost that company ABC uses to produce x graphing calculators in a month is given by y = 1.5x + 150
What is an equation?An equation is an expression that shows the relationship between two or more variables and numbers.
The standard form of a linear function is:
y = mx + b
Where m is the rate of change and b is the initial value of y.
Let y represent the total cost of producing x calculators in a month, hence:
y = 1.5x + 150
The total cost that company ABC uses to produce x graphing calculators in a month is given by y = 1.5x + 150
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help help help help me please
find the LCM of 40 45 and 60 by prime factorization method
Answer:
This is the answer of this question. Hope it helps.
7x-x
simplify please
Based on the given task content; the simplification of 7x - x to its simplest form is 6x.
SimplificationSimplify 7x - x
There are two terms in the expressionThe terms are;7x and -x
The terms both have the same variable xThe term -x have an imaginary coefficient of 1So,
7x - x
= 6x
Therefore, 6x is the result of the simplification of 7x - x to its simplest form.
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Lois made a dish with61/3 cups of pasta. One serving of the pasta is 0.2 cups. How many servings of pasta were in the dish Lois made?
A.
B.
C.
D.
The number of servings of pasta were in the dish Lois made is 31.67.
Unit valueNumber of cups of pasta Lois made = 6 1/3 cupsA serving of the pasta = 0.2 cupsNumber of servings of pasta were in the dish Lois made = Number of cups of pasta Lois made / A serving of the pasta
= 6 1/3 ÷ 0.2
= 19/3 ÷ 0.2
= 19/3 × 1/0.2
= (19×1) / (3 × 0.2)
= 19/0.6
= 31.6666666666666
Approximately,
Number of servings of pasta were in the dish Lois made is 31.67 servings
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5. (04.03 LC) Given a polynomial f(x), if (x + 5) is a factor, what else must be true? (6 points) O f(0) = 5 Of(0) = -5 O f(5) = 0 f(-5) = 0 6. (04.04 LC)
If (x+5) is a factor of f(x) then the condition that will be true is f(-5)=0.
Given that (x+5) is a factor the polynomial f(x) and we are required to be the condition that will be true.
Polynomial is combination of algebraic terms may be in addition, subtraction, multiplication and division. If the highest power of variable in polynomial is one then it is said to be monomial ,If the highest power of variable in polynomial is two then it is said to be binomial,If the highest power of variable in polynomial is three then it is said to be trinomial and many more polynomials.
Factors are the numbers which when multiplied gives the number whose factors they are.
It is given that (x+5) is a factor of f(x).
Put (x+5)=0
x=-5
means when we are putting x=-5 then we will get 0.
Hence if (x+5) is a factor of f(x) then the condition that will be true is f(-5)=0.
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Determine whether the following series converges or diverges using any test. Be sure to clearly state what test(s) you are using and check any conditions needed to apply that test.
According to the ratio criterion, the rational series presented in the picture converges as x < 1. The limit L was 4 /5.
How to determine whether a series converges by ratio criterioHerein we have a series in rational form, whose convergence can be proved by the ratio criterion, whose defintion is shown below:
x = lim (n → ∞) |aₙ/aₙ₊₁| (1)
The series converges if x < 0 and diverges when x > 1. If x = 1, the criterion cannot be used and another criterion must be used instead. Now we proceed to apply it on the expression behind the series:
|aₙ/aₙ₊₁| = [(2 · n + 1) · (2 · n + 2)] / [5 · (n + 1)²]
|aₙ/aₙ₊₁| = [4 · n² + 5 · n + 2] / [5 · n² + 10 · n + 5]
Then, by applying the limit property for rational equations we find that limit of the expression within the series is:
L = 4 / 5
According to the ratio criterion, the rational series presented in the picture converges as x < 1. The limit L was 4 /5.
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By the ratio test, the series diverges.
[tex]\displaystyle \lim_{k\to\infty} \left| \frac{5^{k+1} ((k+1)!)^2}{(2(k+1))!} \cdot \frac{(2k)!}{(5^k (k!)^2}\right| = 5 \lim_{k\to\infty} \frac{(k+1)^2}{(2k+2)(2k+1)} = \frac54 > 1[/tex]
A prism is created using 2 regular pentagons as bases. The apothem of each pentagon is 2.8 centimeters.
A regular pentagonal prism is shown. The apothem of each pentagon is 2.8 centimeters. The height of the prism is (2 x + 1). All sides of the pentagon are congruent.
Which expression represents the volume of the prism, in cubic centimeters?
9x2 + 7x
14x2 + 7x
16x2 + 14x
28x2 + 14x
the expression that represents the volume of the prism is 14x² + 7x cubic centimeters. Option 2
What is the volume of a pentagonal prism?The volume of a pentagonal prism is determined using the formula;
V = 5/2abh
where
a is the apothemh is the height of the prismb is the base of the prismNow, let's substitute the values given
Let the base be 'x'
The apothem is 2. 8 centimeters
height is 2x + 1
Volume = 5/ 2 × 2. 8 × x × (2x + 1)
Volume = 14/ 2 × x(2x + 1)
Volume = 7x(2x + 1)
Volume = 14x² + 7x
Thus, the expression that represents the volume of the prism is 14x² + 7x cubic centimeters. Option 2
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A point P lies on the line with equation y= 4-3X. The point P is a distance √34 from the origin. Find the two possible positions Of point P
The two possible positions of point P are:
(3, -5) and (0.6, 5.8)
How to find the two possible positions of point P?
We know that point P lies on the line:
y = 4 - 3*x
And that the distance between P and the origin is √34, then if the coordinates of point P are (x, y), we have that:
[tex]\sqrt{34} = \sqrt{x^2 + y^2}[/tex]
Now, we can replace "y" in the distance equation by the linear equation, and also remove the square roots:
[tex]34 = x^2 + (4 - 3x)^2[/tex]
Now we can solve the quadratic equation for x:
[tex]34 = x^2 + 9x^2 + 16 - 24x\\\\10x^2 - 24x - 18 = 0\\\\[/tex]
The solutions are:
[tex]x = \frac{24 \pm \sqrt{(-24)^2 - 4*10*(-18)} }{2*10} \\\\x = \frac{24 \pm36}{20}[/tex]
So the two solutions are:
x = (24 + 36)/20 = 3
x = (24 - 36)/20 = -0.6
To get the points, we need to evaluate y on these values:
y = 4 - 3*3 = -5 So we have P = (3, -5)
y = 4 - 3*(-0.6) = 2.2 So we have the point (0.6, 5.8)
There are the two possible positions of point P.
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14²-34 divided by -9+7.2
Answer:
Let's go part by part:
14 raised to 2 = 196
-9+7x2=-9+14 = 5
196/5= 39,2 (final result)
Answer:
-3.2
Step-by-step explanation:
14 SQUARED is 196
196 - 34 = 5.7647
- 9 + 7.2 = - 1.8
5.7647 / -1.8 = -3.2
-3.2 would be your answer.
Thanks for the help in advance
Answer:
60
Step-by-step explanation:
Answer: 60
Step-by-step explanation: