Answer:
(b) (x -10)(x +10)
Step-by-step explanation:
The factorization of the difference of squares is a special form:
a² -b² = (a -b)(a +b)
ApplicationYour expression is recognizable as the difference of squares:
x² -100 = x -10²
Using the above form, the factorization is ...
= (x -10)(x +10) . . . . . . . . matches the second choice
if AC is parallel to DE, find X
Answer: x = 50
Concept:
Here, we need to know the idea of alternative interior angles and the angle sum theorem.
Alternative interior angles are angles that are formed inside the two parallel lines, and the values are equal.
The angle sum theorem implies that the sum of interior angles of a triangle is 180°
If you are still confused, please refer to the attachment below or let me know.
Step-by-step explanation:
Given information:
AC ║ DE
∠ABC = 85°
∠A = 135°
Find the value of ∠BAC
∠A + ∠BAC = 180° (Supplementary angle)
(135°) + ∠BAC = 180°
∠BAC = 45°
Find the value of ∠BCA
∠ABC + ∠BAC + ∠BCA = 180° (Angle sum theorem)
(85°) + (45°) + ∠BCA = 180°
∠BCA = 50°
Find the value of x (∠EBC)
∠EBC ≅ ∠BCA (Alternative interior angles)
Since, ∠BCA = 50°
Therefore, ∠EBC = 50°
[tex]\Large\boxed{x=50}[/tex]
Hope this helps!! :)
Please let me know if you have any questions
Select the correct answer. The graph of function f is shown. An exponential function passes through (minus 4, 9), (0, 1), (1, 0), and (5, minus 2). Function g is represented by the table. x -1 0 1 2 3 4 g(x) 24 6 0 -2 Which statement correctly compares the two functions? A. They have different end behavior as x approaches -∞ and different end behavior as x approaches ∞. B. They have different end behavior as x approaches -∞ but the same end behavior as x approaches ∞. C. They have the same end behavior as x approaches -∞ and the same end behavior as x approaches ∞. D. They have the same end behavior as x approaches -∞ but different end behavior as x approaches ∞.
The answer choice which correctly draws a comparison between the end behaviours of the functions is; Choice C; They have the same end behavior as x approaches -∞ and same end behavior as x approaches ∞.
Which answer choice correctly compares the end behaviour of the functions?As given in the task content; the graph of the exponential function passes through (-4, 9), (0, 1), (1, 0), and (5, -2).
It therefore follows that as; x reduces (approaches -∞), the y value increases.
And, as x -increases (approaches +∞), the y-value decreases.
For the table, the values can be written as coordinates as follows; (-1,2), (0,4), (1,6), (2, 0), (3,-2).
Consequently, as x reduces (approaches -∞), the y- values decrease.
And, as x increases (approaches +∞), the y-values decrease.
Ultimately, the two functions in discuss can be concluded to have; Choice C.
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Please help 3.7Q3. Please type the answer in order.
Step-by-step explanation:
since the y- axis stands for velocity (and the x-axus for time), speeding up means when the curve goes up (increasing velocity), and slowing down means when the curve goes down (decreasing velocity), all when reading the graph from left to right (small time values to larger time values).
(a)
speeding up
t in [0, 1)
or
0 <= t < 1
I would exclude t = 1, because at that point the slope is 0, there is no speeding up there.
slowing down
t in (1, 3)
or
1 < t < 3
the same argumentation for excluding 1 and 3, because there the slope of the curve turns 0 (just the turning point from one tendency to the other), and there is no speeding up or slowing down at these points.
(b)
speeding up
t in (1. 2)
or
1 < t < 2
slowing down
t in [0, 1) or in (2, infinity)
or
0 <= t < 1 || 2< t < infinity
we could use 3 instead of infinity, as this seems to be the last point of the drawn curve, but normally this kind of drawing tells me "infinity".
To reduce their expected estate tax liability prior to either spouse's death, the Hansens could?
If the Hansens want to reduce their expected estate tax liability prior to the death of either of the spouses, they could initiate a Marital Transfer.
What is a marital transfer?A Marital transfer simply means that the Hansens should bequest their assets to each each other in case either of them die.
If this happens, the surviving spouse will not be charged any estate taxes because bequests to spouses are not subject to taxation.
To do this, the Hansens should put it into both of their wills that they plan to gift/ bequest their assets to their spouse if they die.
The big disadvantage of using a marital transfer however, is that the estate will still be subject to taxes when the surviving spouse dies. All the estate taxes that had been avoided would then be incurred by the estate but only after the death of both spouses.
In conclusion, they should use a marital transfer.
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Look for a pattern in the data set to determine which kind of model best describes the data.
Running Speed of a Human
Distance Traveled
(miles)
1
2
3
4
Average Speed
(miles per hour)
7
6.3
5.67
5.103
The data appear to be linear.
The data appear to be quadratic.
The data appear to be cubic.
The data appear to be exponential.
On looking for a pattern in the given data set, the quadratic model best describes the data.
2nd option is correct.
A data model represents the type of relationship between the variables of a data set.
Data models are of four types, namely, Linear, Cubic, Quadratic and Exponential data models.
Given data is:
Distance Traveled Average Speed(miles per hour)
(miles)
1 7
2 6.3
3 5.67
4 5.103
A quadratic model is the best data model for the given data set.
The pattern observed in the given data set observes the properties of a quadratic function.
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Answer:
Exponential is the correct answer.
Step-by-step explanation:
Triangle ABC is a non-right triangle with Angle C = 117, a = 12, and b = 18. Find Angle B to the nearest tenth.
Using the law of cosines and sines, the measure of angle B is: 38.4°.
What is the Law of Cosines and Sines?Law of cosines is: c = √[a² + b² ﹣ 2ab(cos C)]
Law of sines is: sin A/a = sin B/b = sin C/c
Use the law of cosines to find c:
c = √[12² + 18² ﹣ 2(12)(18)(cos 117)]
c ≈ 25.8
Use the law of sines to find angle B:
sin B/b = sin C/c
sin B/18 = sin 117/25.8
sin B = (sin 117 × 18)/25.8
sin B = 0.6216
B = sin^(-1)(0.6216)
B = 38.4°
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simplify 12x^6-4x^4+6x^2 over 2x^2
Answer:
6x⁴ - 2x² +3
Step-by-step explanation:
[tex]\frac{12x^6-4x^4+6x^2}{2x^2}=6x^4 - 2x^2 + 3[/tex]
List all elements of B that belong to specified set B={10, square root of 5, -14, 2/3, square root of 16, 0.81
The irrational number on set B is given by: [tex]\sqrt{5}[/tex]
What are irrational numbers?Irrational numbers are numbers that cannot be represented by fractions. The two most common examples are:
Non-exact roots.Non-terminating decimal.In the set B given in this problem, the only number that is irrational is [tex]\sqrt{5}[/tex], as it is a non-exact root.
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each of the two equal angles of an isosceles triangle is half the third angle find the angles of the triangle
Answer:
Two Equal Angles = 45°
Third Angle = 90°
Step-by-step explanation:
Given information
Two equal angles of an isosceles triangle are half the third angle
Set variables
Let x be the angle of the equal angles of the isosceles triangle
Let 2x be the angle of the third angle
Set equations
x + x + 2x = 180 (Triangle angle sum theorem)
Combine like terms
2x + 2x = 180
4x = 180
Divide 4 on both sides
4x / 4 = 180 / 4
[tex]\Large\boxed{x=45^\circ}[/tex]
Substitute the x value into the expression to find the third angle
Third angle = 2x
= 2 (45)
= [tex]\Large\boxed{90^\circ}[/tex]
Hope this helps!! :)
Please let me know if you have any questions
Prove: In an equilateral triangle the three medians are equal
Step-by-step explanation:
Let ABC be the equilateral triangle. Let AE, BD and CF be the medians. A meridian divides a side into two equal parts. Hence, proved that medians of an equilateral triangle are equal .
prove the identity 2(sin⁶theta + cos⁶theta) - 3(sin⁴ + cos⁴theta) + 1 = 0
Answer:
LHS=2(sin
6
θ+cos
6
θ)−3(sin
4
θ+cos
4
θ)+1
=2{(sin
2
θ+cos
2
θ)
3
−3sin
2
θcos
2
θ(sin
2
θ+cos
2
θ)}−3(sin
2
θ+cos
2
θ)
2
−2(sin
2
θcos
2
θ)}+1
We know, [sin²x+cos²x=1]
=2{1−3sin
2
θcos
2
θ}−3{1−2sin
2
θcos
2
θ}+1
=2−6sin
2
θcos
2
θ−3+6sin
2
θcos
2
θ+1
=0
=RHS
Step-by-step explanation:
If h(x) = 3x - 1 and j(x) = -2x, solve h[j(2)]
Answer:
-13
Step-by-step explanation:
First, we will find the value of j(2) first.
j(2) = -2(2) = -4
next, we will solve h[j(2)].
h[j(2)] = h(-4) = 3(-4) - 1 = -12 - 1 = -13
Calculus help please, will give brainiest
The most convenient way to capture [tex]D[/tex] is with the parameterization
[tex]D = \left\{(x,y) \mid -1 \le y \le 3 \text{ and } -\dfrac{y+1}2 \le x \le y+1\right\}[/tex]
so we only need one iterated integral.
[tex]\displaystyle \iint_D e^{x-y} \, dA = \int_{-1}^3 \int_{-(y+1)/2}^{y+1} e^{x-y} \, dx \, dy[/tex]
Compute the integral with respect to [tex]x[/tex].
[tex]\displaystyle \int_{-(y+1)/2}^{y+1} e^{x-y} \, dx = e^{x-y} \bigg|_{x=-(y+1)/2}^{x=y+1} = e^{(y+1)-y} - e^{-(y+1)/2-y} = e - e^{-(3y+1)/2}[/tex]
Compute the remaining integral.
[tex]\displaystyle \int_{-1}^3 \left(e - e^{-(3y+1)/2}\right) \, dy = \left(ey + \frac23 e^{-(3y+1)/2}\right)\bigg|_{y=-1}^{y=3} \\\\ ~~~~~~~~ = \left(3e + \frac23 e^{-(9+1)/2}\right) - \left(-e + \frac23 e^{-(-3+1)/2}\right) \\\\ ~~~~~~~~ = \boxed{\frac{10e}3 + \frac2{3e^5}}[/tex]
If we had chosen the opposite order of variables, we would have used
[tex]D = \left\{(x,y) \mid -2 \le x \le 4 \text{ and } \max\left(-2x-1,x-1\right)\le y\le3\right\}[/tex]
where
[tex]\max(-2x-1, x-1) = \begin{cases} -2x-1 & \text{when } x<0 \\ x-1 & \text{when } x\ge0\end{cases}[/tex]
so we would have needed two iterated integrals,
[tex]\displaystyle \iint_D e^{x-y} \, dA = \int_{-2}^0 \int_{-2x-1}^3 e^{x-y} \, dy \, dx + \int_0^4 \int_{x-1}^3 e^{x-y} \, dy \, dx[/tex]
Pls help me with these questions
Step-by-step explanation:
6 and 7 was already answered so I'll do 5 and 8.
5. The point the curve crosses the x axis is the x intercept, to find the x intercept of a rational function, we set y=0, and solve for x.
[tex]0 = \frac{x - 4}{x} [/tex]
Set the numerator equal to 0.
[tex]x - 4 = 0[/tex]
[tex]x = 4[/tex]
So the x intercept is (4,0).
Next, to find gradient, we take the derivative of the function.
[tex] \frac{x - 4}{x} [/tex]
We could use product rule, but for simplicity, serperate the function
[tex] \frac{x}{x} - \frac{4}{x} [/tex]
[tex]1 - \frac{4}{x} [/tex]
Next using exponents rules,
[tex]1 - 4 {x}^{ - 1} [/tex]
Now we take the derivative,
Derivative of a constant is zero.
Derivative of a power function,
[tex]n \times x {}^{n - 1} [/tex]
We move the exponent to the front, then we subtract the exponent by 1.
So, we get
[tex]4 {x}^{ - 2} [/tex]
Now, we plug in. 4,
[tex]4(4) {}^{ - 2} [/tex]
[tex]4 \times \frac{1}{16} = \frac{1}{4} [/tex]
The slope or gradient at the x intercept is 1/4
8. The derivative of ax^2+bx, with respect to x is
[tex]2ax + b[/tex]
When x=2, we have a gradient of 8.
[tex]2a(2) + b = 8[/tex]
[tex]4a + b = 8[/tex]
When x=-1, we have a gradient of -10.
[tex]2a( - 1) + b = - 10[/tex]
[tex] - 2a + b = - 10[/tex]
We have two system of equations,
[tex]4a + b = 8[/tex]
[tex] - 2a + b = - 10[/tex]
Let subtract the system to eliminate b.
[tex]6a = 18[/tex]
[tex]a = 3[/tex]
Plug 3 for a, back in to solve for b.
[tex]4(3) + b = 8[/tex]
[tex]12 + b = 8[/tex]
[tex]b = - 4[/tex]
So a is 3
b is -4
can anyone help me solve this?
[tex] \frac{ \sqrt{x + 8} - \sqrt{x} }{8} \times \frac{ \sqrt{x + 8} + \sqrt{x} }{ \sqrt{x + 8} + \sqrt{x} } \\[/tex]
[tex] \frac{( \sqrt{x + 8} ) {}^{2} - ( \sqrt{x}) {}^{2} }{8( \sqrt{x + 8} + \sqrt{x} ) } \\ [/tex]
[tex] \frac{( \sqrt{x + 8} ) {}^{2} - ( \sqrt{x}) {}^{2} }{8( \sqrt{x + 8} + \sqrt{x} ) } \\ \frac{x + 8 - x}{8 \sqrt{x + 8} + 8 \sqrt{x} } = \frac{8}{8 \sqrt{x + 8} + 8 \sqrt{x} } [/tex]
PLEASEEEEEEEEEE HELPPPP. which of the following system of inequalities would produce the region indicated on the graph below?
Answer: C
Step-by-step explanation:
The line [tex]y=x+2[/tex] is shaded below and is solid.
This eliminates all the options except for C.
PLEASE HELP ASAPP PLEASE
Answer: Interior Angle
Step-by-step explanation:
The angle BAD is fully enclosed, it is on the inside
She used a graphing tool to display the data in a scatter plot, with x representing the number of ice cubes and y representing the milliliters of juice. Then she used the graphing tool to find the equation of the line of best fit:
y = -29.202x + 293.5.
Based on the line of best fit, approximately how many milliliters of juice will be in a glass with 7 ice cubes?
The glass will contain 89.086 milliliters of juice with 7 ice cubes, using the equation of the line of best fit, y = -29.202x + 293.5.
In the question, we are informed that the equation of the line of best fit, for the, scatter plot with x representing the number of ice cubes and y representing the milliliters of juice is given as y = -29.202x + 293.5.
We are asked to tell how many milliliters of juice will be in a glass with 7 ice cubes based on the line of best fit.
To find the milliliters of juice in the glass with 7 ice cubes, we substitute x = 7, in the equation of the line of best fit, to get a value of y, representing the milliliters of juice in the glass.
Thus,
y = -29.202x + 293.5,
or, y = -29.202(7) + 293.5 {Substituting x = 7},
or, y = -204.414 + 293.5,
or, y = 89.086.
Thus, the glass will contain 89.086 milliliters of juice with 7 ice cubes, using the equation of the line of best fit, y = -29.202x + 293.5.
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a) If x = a + 7 and y = b-a, show that x + y = b + 7.
Step-by-step explanation:
x = a + 7
y = b-a
To prove
x + y = b + 7.
x+y= (a+7) + (b-a)=a+7+b-a
=a-a+7+b
=0 + 7+b
= b+7
Proved ✅
Given the following exponential function, identify whether the change
represents growth or decay, and determine the percentage rate of increase or
decrease.
y = 540(1.04)
Step-by-step explanation:
We can determine whether the change represents exponential growth or decay by seeing whether the number being raised to x is between 0 and 1, or greater than 1.
In the equation [tex]y = 540(1.04)^x[/tex], y will increase every time that x increases, as we are multiplying by a number greater than 1 every time.
Hence, this exponential function represents exponential growth.
The percentage rate of increase for this function would be how much the y-value increases each time. Since we are multiplying by 1.04, each time the new value is 104% the original y-value. Hence, the percentage increase is 4%.
To begin to better understand personal experiences of headache pain, a drug manufacturer has asked 18 adults to rate their most recent headache on a scale of 0 to 100 (with 0 corresponding to no pain and 100 corresponding to the greatest pain the person has ever felt). Here are the 18 ratings.
The answers to these questions are:
Non of the abovemeanmean and medianmean is greater.How to solve for the solutionsa. In the question we have the existence of the mean, the mode and the median hence the answer to this question is none.
b. if the measurement 14 is replaced by 2, the data that it is going to have the most effect on is going to be the mean. It would reduce the mean.
c. If the largest measurement is removed, it is going to have the most effects on the mean and the median.
d. If the data is skewed then the mean of the data set is going to be greater.
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What is the largest prime number p such that 8 times p is less than 1000?
Answer:
113
Step-by-step explanation:
first we need to divide 1000 by 8 to get 125.
Our prime number has to be less than 125.
The largest prime number less than 125 is 113.
A worker uses a small table in a notebook to track the cost of materials. On the current job he has used seven sheets of plywood at $43.75 each, two boxes of screws at $4.69 each and a tube of adhesive which cost $9.89, as shown below.
The total cost of the materials calculated by the worker on the notebook is $325.52
What is an equation?
An equation is an expression that shows the relationship between two or more numbers and variables.
An independent variable is a variable that does not depend on any other variable for its value while a dependent variable is a variable that depends on other variable.
The total cost of materials = 7(43.75) + 2(4.69) + 9.89 = $325.52
The total cost of the materials calculated by the worker on the notebook is $325.52
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I need the answers to this question
Answer: Madison can travel 2.2 miles less than Anthony on one gallon of gas.
Step-by-step explanation:
The equation y = 39.1[tex]x[/tex] represents the number of miles, [tex]y[/tex], that madison can drive her car for every x gallons of gas.
Question: Madison can travel _ miles _ than Anthony on one gallon of gas.
Lets find how much Madison travels on 1 gallon of gas.
39.1(1) = 39.1
Therefore, Madison travels 39.1 miles on one gallon of gas.
Now lets solve for Anthony
Anthony travels 380.7 miles on 9 gallons of gas.
Therefore we can set up the equation:
9x = 380.7 to show that 9 gallons equates to 380.7 miles
to solve divide 9 from both sides
[tex]\frac{9x}{9} =\frac{380.7}{9}[/tex]
x = 41.3
So, Anthony travels 41.3 miles on one gallon of gas
Now find whether Madison travels more or less than Anthony on one gallon.
39.1 - 41.3 = -2.2
This means that Anthony can travel 2.2 miles more than Madison.
For your answer, this means that:
Madison can travel 2.2 miles less than Anthony on one gallon of gas
Hope this helped and have a nice day :)
look at the screenshot and explain your answer pls
Answer:
f(x) = g(x) + 9 because it is shifted 9 to the right
Sam drove from his house to college. When he stopped at college, he saw on the instrument panel of his car that he covered 26.5km. What is the displacement?
Answer:
instruments are very important to the direction of the personal information and concerns about the direction
please help.
A report by the NCAA states that 57.5% of football injuries occur during practices. A head trainer claims that this is too high for this conference, so he randomly selects 36 injuries and founds that 17 occurred during practices. Is his claims correct at a=0.05?
Answer:
he is more likely incorrect.
Step-by-step explanation:
Z = (ps - p0)/sqrt(p0(1-p0)/n)
ps = proportion sample
p0 = proportion null hypothesis (NCAA)
n = sample size
ps = 17 / 36/100 = 17/1 / 36/100 = 1700/36 =
= 47.22222222...%
Z = (0.47222... - 0.575)/sqrt(0.575(1 - 0.575)/36) =
= -0.10277777... /sqrt(0.244375 / 36) =
= -0.10277777... / 0.0823905... =
= -1.247446952... ≈ -1.25
p(-1.25) = 0.10565
0.10565 > 0.05
the null hypothesis is therefore likely, or at least cannot be rejected.
so, his claims are not supported, as surprising as this might feel given that the sample result itself is 10 points off the NCCA result, which feels to be a solid difference.
Question is on the paper
Note: Spam/Irrelevant answers will be blocked and reported
The dimensions based on the area given are 15cm by 20cm.
How to calculate the sides?From the information given about the rectangle, the area is given as 300cm² and the margins are given as 1.5 and 2.
Therefore, the dimensions will be:
(1.5 × x) × (2 × x) = 300
1.5x × 2x = 300
3x² = 300
x² = 300/3
x² = 100
x = 10
Therefore the dimensions will be:
= 1.5x = 1.5 × 10 = 15
= 2x = 2 × 10 = 20
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We minimize the total area of the sheet
[tex]S = xy[/tex]
constrained by
[tex](x-4)(y-3) = 300[/tex]
Solve the constraint equation for [tex]y[/tex].
[tex](x-4)(y-3) = 300 \implies y-3 = \dfrac{300}{x-4} \implies y = 3 + \dfrac{300}{x-4} = \dfrac{3x+288}{x-4}[/tex]
Substitute this into [tex]S[/tex] and find the critical points.
[tex]S = \dfrac{3x^2+288x}{x-4} = 3x + 300 + \dfrac{1200}{x-4}[/tex]
[tex]\dfrac{dS}{dx} = 3 - \dfrac{1200}{(x-4)^2} = 0[/tex]
[tex]\implies \dfrac{1200}{(x-4)^2} = 3[/tex]
[tex]\implies (x-4)^2 = 400[/tex]
[tex]\implies x-4 = \pm20[/tex]
[tex]\implies x=-16 \text{ or } x = 24[/tex]
Of course [tex]x[/tex] can't be negative, so the page dimensions that minimize [tex]S[/tex] are [tex]x=24[/tex] and [tex]y=18[/tex].
Talia noticed that she does not have a common factor. What should she do?
Talia needs to leave the polynomial as is because it is prime and cannot be factored.
Talia needs to factor out a 3x from the first group and a 4x from the second group.
Talia needs to factor out a negative from one of the groups so the binomials will be the same.
Talia needs to apply the distributive property to get the expression (3x + 4)(5x – 1).
The correct option regarding Talia factoring is given by:
Talia needs to factor out a negative from one of the groups so the binomials will be the same.
Which expression is Talia tying to factor?The expression is given by:
(15x² - 3x) + (-20x + 4).
Her first step was:
3x(5x - 1) + 4(-5x + 1)
After that, she did not factor out anything more out of the expression. However, looking at the two terms of the addition, we can realize that:
(-5x + 1) = -(5x - 1), hence she should factor out the negative.
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DETAILS BASSELEMMATH7 9.PP1.035. 0/1 Submissions Used The measure of the smallest angle of a right triangle is 10° less than the measure of the other small angle. Find the measures of all three angles in degrees. smallest angle largest angle.
Answer:
40°, 50°, and 90°
Step-by-step explanation:
Let the smallest angle be x.
Then, the other small angle is x+10.
The acute angles of a right triangle are complementary, so x+x+10=90, and thus x=40.
So, the acute angles measure 40° and 50°.
Therefore, the three angles are 40°, 50°, and 90°.