(1 point) Say that r is the linear transformation R²->R² that is a counterclockwise rotation by π/2 radians. What is the standard matrix 4 for r?a=[ ]Say that S is the linear transformation R²->R² that is reflection about the line y-x. What is the standard matrix B for R?b=[ ]Now suppose that I is the linear transformation R² ->R² that is counterclockwise rotation by π/2 radians followed by reflection about the liney-x. What is the standard matrix C for T?c=[ ]Given that I is equal to the composition So R, how can we obtain C from A and B?A. C=A-BB. C=ABC. C=A+BD. C=AB^{-1}E. C=BA

(rho, θ, ϕ) = (sqrt(6), 3π/4 or 7π/4, arccos(-sqrt(2/3)) or 2π - arccos(-sqrt(2/3)) or π - arccos(-sqrt(2/3)) or π + arccos(-sqrt(2/3))).

(a) Rectangular coordinates are (0, -6, 0). From the distance formula, we have rho = sqrt(x^2 + y^2 + z^2) = sqrt(0^2 + (-6)^2 + 0^2) = 6.

Since x = rhosin(ϕ)cos(θ) and z = rhocos(ϕ), we have 0 = rhocos(ϕ) which implies ϕ = π/2. Also, -6 = rho*sin(ϕ)sin(θ), but sin(ϕ) = 1, so we have -6 = rhosin(θ) or sin(θ) = -6/6 = -1. Therefore, we have (rho, θ, ϕ) = (6, π, π/2).

(b) Rectangular coordinates are (-1, 1, -2). From the distance formula, we have rho = sqrt(x^2 + y^2 + z^2) = sqrt(1^2 + 1^2 + (-2)^2) = sqrt(6).

Since x = rho*sin(ϕ)cos(θ), y = rhosin(ϕ)sin(θ), and z = rhocos(ϕ), we have:

-1 = sqrt(6)*sin(ϕ)*cos(θ)

1 = sqrt(6)*sin(ϕ)*sin(θ)

-2 = sqrt(6)*cos(ϕ)

From the first two equations, we have:

tan(θ) = 1/-1 = -1

Therefore, θ = 3π/4 or 7π/4.

From the third equation, we have:

cos(ϕ) = -2/sqrt(6) = -sqrt(2/3)

Therefore, ϕ = arccos(-sqrt(2/3)).

Finally, from the first equation, we have:

sin(ϕ)*cos(θ) = -1/sqrt(6)

Therefore, sin(ϕ) = -1/(sqrt(6)*cos(θ)) and we can compute ϕ using arccos(-sqrt(2/3)) and arccos(cos(θ)):

If θ = 3π/4, then cos(θ) = -1/sqrt(2), and sin(ϕ) = -sqrt(3/2). Thus, ϕ = arccos(-sqrt(2/3)) or ϕ = 2π - arccos(-sqrt(2/3)).

If θ = 7π/4, then cos(θ) = -1/sqrt(2), and sin(ϕ) = sqrt(3/2). Thus, ϕ = π - arccos(-sqrt(2/3)) or ϕ = π + arccos(-sqrt(2/3)).

Therefore, the spherical coordinates of the point (-1, 1, -2) are:

(rho, θ, ϕ) = (sqrt(6), 3π/4 or 7π/4, arccos(-sqrt(2/3)) or 2π - arccos(-sqrt(2/3)) or π - arccos(-sqrt(2/3)) or π + arccos(-sqrt(2/3))).

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The equation of the tangent line to f-1(x) at the point (3, -1) is y = 1/(-2) x - 1/2.

This is because the slope of the tangent line to f(x) at (-1,3) is -2, and since f(x) and f-1(x) are inverse functions, the slopes of their tangent lines are reciprocals.

Therefore, the slope of the tangent line to f-1(x) at (3,-1) is -1/2. To find the y-intercept, we can use the fact that the point (3,-1) is on the tangent line. Plugging in x=3 and y=-1 into the equation y = -1/2 x + b, we get b = 1/2. Therefore, the equation of the tangent line to f-1(x) at (3,-1) is y = 1/(-2) x - 1/2.

In summary, to find the equation of the tangent line to f-1(x) at a point (a,b), we first find the point (c,d) on the graph of f(x) that corresponds to (a,b) under the inverse function.

Then, we find the slope of the tangent line to f(x) at (c,d), take the reciprocal, and plug it into the point-slope formula to find the equation of the tangent line to f-1(x) at (a,b).

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The sum of the convergent geometric series is 1/7.

The geometric series in question is given by the formula: (−3)(n-1) / (4n), with n starting from 1 to infinity. To determine if it's convergent or divergent, we need to find the common ratio, r.

The common ratio, r, can be found by dividing the term a_(n+1) by the term a_n:

r = [(−3)n / (4(n+1))] / [(−3)(n-1) / (4n)]

After simplifying, we get:

r = (-3) / 4

Since the absolute value of r, |r| = |-3/4| = 3/4, which is less than 1, the geometric series is convergent.

To find the sum of the convergent series, we use the formula:

Sum = a_1 / (1 - r)

In this case, a_1 is the first term of the series when n = 1:

a_1 = (−3)(1-1) / (4) = 1/4

Now we can find the sum:

Sum = (1/4) / (1 - (-3/4)) = (1/4) / (7/4) = 1/7

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The solution for the given system of linear equations is a ≈ -1.13, b ≈ -4.01, c ≈ 2.75, d ≈ 9.22, and e ≈ -6.09.


1. Write the given equations in matrix form (A * X = B), where A is the matrix of coefficients, X is the matrix of variables (a, b, c, d, e), and B is the matrix of constants (57.1, 27.6, -81.2, -22.2, -12.2).

2. To solve using inverse method, first, find the inverse of matrix A (A_inv). Use any tool or method for matrix inversion, such as Gaussian elimination or Cramer's rule.

3. Multiply A_inv with matrix B (A_inv * B) to obtain the matrix X, which contains the solutions for a, b, c, d, and e.

4. For the left division method, you can use MATLAB or Octave software. Use the command "X = A \ B" to obtain the matrix X, which contains the solutions for a, b, c, d, and e.

After performing the calculations, the approximate solutions are a ≈ -1.13, b ≈ -4.01, c ≈ 2.75, d ≈ 9.22, and e ≈ -6.09.

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The probability that a 25-year-old person from this group prefers biking is: 68/229.

The total number of people in the survey between the ages of 23 and 27 is 229. The number of people who prefer biking in this group is 68.

Therefore, the probability that a 25-year-old person from this group prefers biking is: 68/229

To simplify the fraction, we can divide both the numerator and denominator by their greatest common factor (GCF), which is 1:

68/229 = 68/229

So the probability that a 25-year-old person from this group prefers biking is 68/229.

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The z value that leaves area 0.1056 in the right tail is approximately 1.26.

The z value that leaves an area of 0.1056 in the right tail is found by using the standard normal distribution table or a z-score calculator.

Here's how to find it:

1. Since the area to the right of the z value is 0.1056, the area to the left will be 1 - 0.1056 = 0.8944.

2. Look up the corresponding z value for the area 0.8944 in a standard normal distribution table or use a z-score calculator.

3. Find the z value associated with this area.

After performing these steps, you will find that the z value that leaves an area of 0.1056 in the right tail is approximately 1.26.

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The approximate solution for the system of equations is x = -48/29

From the question, we have the following parameters that can be used in our computation:

f(x) = 5/8x + 2

g(x) = -3x - 4

To calculate the solution for the system of equations, we have the following

f(x) = g(x)

Substitute the known values in the above equation, so, we have the following representation

5/8x + 2 = -3x - 4

Multiply through by 8

So, we have

5x + 16 = -24x - 32

Evaluate the like terms

29x = -48

Evaluate

x = -48/29

Hence, the solution is x = -48/29

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Answer:

0.064 mi³

Step-by-step explanation:

Volume of cube = s³

S = 2/5 mi

Let's solve

(2/5)³ = 0.064 mi³

So, the volume of the cube is 0.064 mi³

The expected change in temperature in degree Fahrenheit for each additional cricket chirp in one minute.

Given the relationship between the number of times a certain species of cricket will chirp in one minute and the temperature outside.

Here, we see that the best fit is a linear regression.

On the y- axis temperature in degree Fahrenheit is labeled and on the x axis chirps per minute is labelled.

Since, the slope = Rate of change of y/ Rate of change of x

So, the slope of line represents the expected change in temperature in degree Fahrenheit for each additional cricket chirp in one minute.

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Answer:

28

Step-by-step explanation:

You must divide 20 by 100 to get 1 percent, then multiply it by 140.

Randy ate 28 pop-tarts this month.

To find out how many pop-tarts Randy ate this month, we first need to calculate 40% of the pop-tarts he ate last month.

To do this, we can multiply 20 by 0.4 to get 8.

Next, we can add this amount to the original number of pop-tarts Randy ate last month (20), giving us a total of 28 pop-tarts for this month.

Therefore, Randy ate 28 pop-tarts this month, which is 40% more than he ate last month.  

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False. If the null hypothesis is rejected using a two-tailed test, it does not necessarily mean it would be rejected if the researcher had used a one-tailed test.

One-tailed tests have more power to detect an effect in a specific direction, but they also have a higher risk of making a Type I error (rejecting the null hypothesis when it's actually true). The decision to use a one-tailed or two-tailed test should be based on the research question and prior knowledge of the expected direction of the effect.

A two-tailed test is more conservative and examines both tails of the distribution, while a one-tailed test focuses on only one direction. The outcome depends on the direction of the effect and the specific hypothesis being tested.

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Therefore, the global minimum of f(x) on S is at [tex]x = 1/\sqrt{5[/tex]and the global maximum does not exist. And the global minimum of f(x) on S is at x = 2 and the global maximum is at x = 1.

A function is a relationship between a set of inputs (called the domain) and a set of outputs (called the range) with the property that each input is associated with exactly one output. In other words, a function maps each element in the domain to a unique element in the range.

Functions are commonly denoted by a symbol such as f(x), where x is an element of the domain and f(x) is the corresponding output value. The domain and range of a function can be specified explicitly or can be determined by the context in which the function is used.

(i) To find the global maximizers and minimizers of the function f(x) = 4x²+1/4x on the interval S=[1/√5,[infinity]], we first need to find the critical points of f(x) within S.

Taking the derivative of f(x) with respect to x, we get:

f'(x) = 8x - 1/4x²

Setting f'(x) = 0 to find critical points, we get:

8x - 1/4x² = 0

Multiplying both sides by 4x², we get:

32x³ - 1 = 0

Solving for x, we get:

x = 1/∛32 = 1/2∛2

Note that this critical point is not in the interval S, so we need to check the endpoints of S as well as any vertical asymptotes of f(x).

At x = 1/√5, we have:

f(1/√5) = 4(1/5) + 1/(4(1/√5)) = 4/5 + √5/4

At x → ∞, we have:

Lim x→∞ f(x) = ∞

Therefore, the global minimum of f(x) on S is at [tex]x = 1/\sqrt5[/tex] and the global maximum does not exist.

(ii) To find the global maximizers and minimizers of the function[tex]f(x) = x^5 - 8x^3[/tex] on the interval S=[1,2], we first need to find the critical points of f(x) within S.

Taking the derivative of f(x) with respect to x, we get:

[tex]f'(x) = 5x^4 - 24x^2[/tex]

Setting f'(x) = 0 to find critical points, we get:

[tex]5x^4 - 24x^2 = 0[/tex]

Factoring out [tex]x^2[/tex], we get:

[tex]x^2(5x^2 - 24) = 0[/tex]

Solving for x, we get:

[tex]x = 0 or x =±\sqrt(24/5)[/tex]

Note that none of these critical points are in the interval S, so we need to check the endpoints of S.

At x = 1, we have:

[tex]f(1) = 1 - 8 = -7[/tex]

At x = 2, we have:

[tex]f(2) = 32 - 64 = -32[/tex]

Therefore, the global minimum of f(x) on S is at x = 2 and the global maximum is at x = 1.

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Step-by-step explanation:

line MO,line NO, line

MN

The value of Lucas number L(4) is 4.

To find L(4) using the recursive definition of Lucas numbers, we'll follow these steps:

1. L(n) = 1 if n = 1
2. L(n) = 3 if n = 2
3. L(n) = L(n-1) + L(n-2) if n > 2

Since we want to find L(4), we need to first find L(3) using the recursive formula:

L(3) = L(2) + L(1)
L(3) = 3 (from step 2) + 1 (from step 1)
L(3) = 4

Now we can find L(4):

L(4) = L(3) + L(2)
L(4) = 4 (from L(3) calculation) + 3 (from step 2)
L(4) = 7

So, the value of L(4) in the Lucas numbers is 7.

Explanation;-

STEP 1:-  First we the recursive relation of the Lucas number, In order to find the value of the L(4) we must know the value of the L(3) and L(2)

STEP 2:- Value of the L(2) is given in question, and we find the value of L(3) by the recursion formula.

STEP 3:-when we get the value of L(3) and L(2) substitute this value in L(4) = L(3) + L(2) to get the value of L(4).

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The steps to use to solve the problem are:

Lizzie had practiced 15 fewer minutes on Tuesday than on Monday.

Note that from the question:

T = Tuesday

M = Monday

So T = M - 15,  

70  = M - 15

Hence  M = 85 minutes.

B. If Lizzie were to worked out for 85 minutes on Monday as well as 70 minutes on Tuesday, so she practiced:

85 - 70

= 15

So  Lizzie had practiced 15 fewer minutes on Tuesday than that of Monday.

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See full question below

Assessment items Lizzie works out 15 fewer minutes on Tuesday than on Monday. She worked out 70 minutes on Tuesday. Use the five-step problem-solving plan. How many minutes did she work out on Monday?How many fewer minutes did Lizzie practice on Tuesday than on Monday?

A2 is the matrix -4 3 -1 -1, a2 is -4. A3 is the matrix 7 -4 -1 -5, a3 is -1. Therefore, the answer is: a1 = 2, a2 = -4, a3 = -1, A1 = 7 3 -5 -1.

Given that A is the matrix:

| 2  4 -7 |
| -4  7  3 |
| -1 -5 -1 |

The cofactor expansion of the determinant of A along column 1 is: det(A) = a1 · |A1| + a2 · |A2|+ a3 · |A3|

Here, a1, a2, and a3 are the elements of the first column of the matrix A:
a1 = 2
a2 = -4
a3 = -1

To find the matrices A1, A2, and A3, we need to remove the corresponding row and column of each element:

A1 is obtained by removing the first row and first column:
| 7  3 |
|-5 -1 |

A2 is obtained by removing the second row and first column:
| 4 -7 |
|-5 -1 |

A3 is obtained by removing the third row and first column:
| 4 -7 |
| 7  3 |

So, the cofactor expansion of the determinant of A along column 1 is:

det(A) = 2 · |A1| - 4 · |A2| - 1 · |A3|

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Answer:

Step-by-step explanation:

Classical probability assumes that all outcomes in the sample space are equally likely to occur. For example, when a single die is rolled, each outcome has the same prob- ability of occurring.

a. The marginal PMFs of U and V can be obtained by summing over all possible values of the other random variables: P(U = u):[tex]= sum_{v=-u}^{u} P(U = u, V = v), P(V = v) \\\\= sum_{u=|v|}^{2-|v|} P(U = u, V = v).[/tex]

and b. P(V = -1) = P(X = 1, Y.

a. The joint probability mass function (PMF) of U and V, we can use the definition of U and V and the fact that X and Y are independent Bernoulli(0.5) random variables:

For U = X + Y and V = X - Y, we have:

U = 0 if X = 0 and Y = 0

U = 1 if (X = 0 and Y = 1) or (X = 1 and Y = 0)

U = 2 if X = 1 and Y = 1

V = 0 if X = 0 and Y = 0

V = 1 if (X = 0 and Y = 1) or (X = 1 and Y = 0)

V = -1 if X = 1 and Y = 1

Using the above equations, we can write the joint PMF of U and V as:

P(U = u, V = v) = P(X = (u+v)/2, Y = (u-v)/2)

Since X and Y are independent Bernoulli(0.5) random variables, we have:

P(X = x, Y = y) = P(X = x) * P(Y = y) = 0.5 * 0.5 = 0.25

Therefore, we can write the joint PMF of U and V as:

P(U = u, V = v) =

{ 0.25 if u+v is even and u-v is even, and u+v >= 0

{ 0 otherwise

The marginal PMFs of U and V can be obtained by summing over all possible values of the other variable:

[tex]P(U = u) = sum_{v=-u}^{u} P(U = u, V = v)\\P(V = v) = sum_{u=|v|}^{2-|v|} P(U = u, V = v)[/tex]

b. To check if U and V are independent, we need to show that their joint PMF factorizes into the product of their marginal PMFs:

P(U = u, V = v) = P(U = u) * P(V = v) for all u and v

Let's consider the case where u+v is even and u-v is even:

P(U = u, V = v) = 0.25

P(U = u) * P(V = v) =

[tex]sum_{v'=-u}^{u} P(U = u) * P(V = v') * delta_{v,v'}[/tex]

= P(U = u) * P(V = v) + P(U = u) * P(V = -v) if u > 0

= P(U = u) * P(V = 0) if u = 0

delta_{v,v'} is the Kronecker delta function that equals 1 if v = v' and 0 otherwise.

Therefore, U and V are independent if and only if P(U = u) * P(V = v) = P(U = u, V = v) for all u and v.

Now let's compute the marginal PMFs of U and V:

P(U = 0) = P(X = 0, Y = 0) = 0.25

P(U = 1) = P(X = 0, Y = 1) + P(X = 1, Y = 0) = 0.5

P(U = 2) = P(X = 1, Y = 1) = 0.25

P(V = -1) = P(X = 1, Y

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The composite function in the form f(g(x)) is: y = f(g(x)) = 5e⁶ˣ

To write y = 5 ex 6 as a composite function in the form f(g(x)), we need to identify the inner function u = g(x) and the outer function y = f(u).

Let u = 6x, which means g(x) = 6x.
Now we need to find f(u).

Let f(u) = 5e^u.

Substituting u = 6x in f(u), we get:
f(u) = 5e⁶ˣ

Therefore, the composite function in the form f(g(x)) is:
y = f(g(x)) = 5e⁶ˣ

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a. To find the median exam score, we need to arrange the scores in order from least to greatest. Then we find the middle score. In this case, the dotplot is not available, so I cannot provide the exact median score. However, once the scores are arranged in order, we can identify the middle score as the median.

b. Without doing any calculations, it is difficult to estimate whether the mean is about the same as the median, higher than the median, or lower than the median. However, if the distribution is roughly symmetric, we can expect the mean to be about the same as the median. If the distribution is skewed, then the mean will be pulled towards the tail of the distribution, and may be higher or lower than the median depending on the direction of the skew. Without additional information about the shape of the distribution, it is difficult to make an accurate estimate.

a. To find the median exam score, follow these steps:

1. Arrange the final exam scores from the dot plot in ascending order.
2. Since there are 25 students (an odd number), the median is the middle value. It is the 13th value in the ordered list.

b. Without doing any calculations, we can estimate if the mean is about the same as the median, higher, or lower based on the distribution of the scores. If the dot plot shows a symmetric distribution, the mean and median would be approximately equal. If the distribution is skewed to the right (with a few high scores pulling the average up), the mean would be higher than the median. If the distribution is skewed to the left (with a few low scores pulling the average down), the mean would be lower than the median. if the distribution is roughly symmetric, we can expect the mean to be about the same as the median.

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it will take the band 50 minutes to walk 10 blocks.

So the answer is (B) 50 minutes.

In general, the term "proportion" refers to a part, share, or amount that is compared to a whole. According to the definition of proportion, two ratios are in proportion when they are equal.

The marching band is marching at a rate of 3 blocks in 15 minutes. To find how long it will take them to walk 10 blocks, we can set up a proportion:

3 blocks / 15 minutes = 10 blocks / x minutes

where x is the time it will take to walk 10 blocks.

Simplifying the proportion:

3/15 = 10/x

Cross-multiplying:

3x = 150

x = 50

Therefore, it will take the band 50 minutes to walk 10 blocks.

So the answer is (B) 50 minutes.

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Answer:

To determine if MaryKate has enough paint without calculating, we would need to know the surface area of the birdhouse she wants to paint. If the surface area of the birdhouse is less than or equal to 39.5ft^2, then MaryKate has enough paint. However, if the surface area of the birdhouse is greater than 39.5ft^2, then MaryKate will not have enough paint to cover the entire birdhouse and will need to purchase more paint.

Answer:

We can tell that MaryKate has enough paint without calculating by comparing the amount of paint needed to the amount of paint she has available. If the amount of paint she has available is greater than or equal to the amount of paint needed to cover the birdhouse, then she has enough paint.

To determine the amount of paint needed to cover the birdhouse, we need to know the surface area of the birdhouse. Without knowing the surface area, we cannot make a definitive conclusion about whether MaryKate has enough paint or not.

However, if we assume that the surface area of the birdhouse is less than or equal to 39.5 square feet, then we can say that MaryKate has enough paint because a pint of paint that covers 39.5 square feet of surface can cover at least the entire birdhouse.

Hope this helps!

The Taylor polynomials P1, P2, P3, and P4 for f(x) = cos(-5x) centered at a = 0 are given by:

P1(x) = 1
P2(x) = 1 + (-5x)²/2!
P3(x) = 1 - 25x²/2! + (-5x)⁴/4!
P4(x) = 1 - 25x²/2! + 625x⁴/4! - (-5x)⁶/6!

To find the Taylor polynomials centered at a = 0 for f(x) = cos(-5x), follow these steps:

1. Calculate the derivatives of f(x) up to the fourth derivative.
2. Evaluate each derivative at a = 0.
3. Use the Taylor polynomial formula to calculate P1, P2, P3, and P4.
4. Simplify the expressions for each polynomial.

Remember that the Taylor polynomial formula is given by:

Pn(x) = f(a) + f'(a)(x-a) + f''(a)(x-a)²/2! + ... + fⁿ(a)(x-a)ⁿ/n!

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To find where the tangent line is horizontal, we set [tex]\frac{Dx}{Dy}[/tex] = 0 and solve for x and y. To find where the tangent line is vertical. The correct answer is These are the points where the tangent line is vertical.

We set the derivative undefined, and solve for x and y.

a) To find [tex]\frac{Dx}{Dy}[/tex], we first differentiate the equation with respect to x:

[tex]3x^2 + 3y^2(dy/dx) - y^2 - 2xy(dy/dx)[/tex][tex]= 0[/tex]

Simplifying and solving for [tex]\frac{Dx}{Dy}[/tex], we get:

[tex]\frac{Dx}{Dy}[/tex] =[tex](y^2 - 3x^2) / (3y^2 - x^2)[/tex]

b) To find where the tangent line is horizontal, we need to find where [tex]\frac{Dx}{Dy}[/tex]=[tex]0[/tex]. Using the equation we found in part a:

[tex](y^2 - 3x^2) / (3y^2 - x^2)[/tex][tex]= 0[/tex]

This occurs when [tex]y^2 = 3x^2.[/tex] Substituting this into the original equation, we get:[tex]x^3 + 3x^2y - xy^2 = 5[/tex]

Solving for y, we get two solutions: [tex]y = x*\sqrt{3}[/tex]

These are the points where the tangent line is horizontal. To find where the tangent line is vertical, we need to find where the derivative is undefined. Using the equation we found in part a:[tex]3y^2 - x^2 = 0[/tex]

This occurs when [tex]y = +/- x*sqrt(3)/3.[/tex] Substituting this into the original equation, we get: [tex]x^3 + 2x^5/27 = 5[/tex]

Solving for x, we get two solutions: [tex]x = -1.554, 1.224[/tex]

Substituting these values back into the equation for y, we get the corresponding y values:[tex]y = -1.345, 1.062[/tex]

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The energy of an electron in a one-dimensional box can be calculated using the formula: E = (n^2 * h^2) / (8 * m * L^2)

where n is the principal quantum number, h is Planck's constant, m is the electron's mass, and L is the length of the box.

The energy of a photon can be calculated using the formula:

E = (h * c) / λ

where c is the speed of light, and λ is the wavelength of the photon.

Given that the energy of the electron and the photon are equal, we can equate the two formulas:

(n^2 * h^2) / (8 * m * L^2) = (h * c) / λ

For n = 1 and λ = 400 nm:

(1^2 * h^2) / (8 * m * L^2) = (h * c) / (400 * 10^-9 m)

Solving for L, we get:

L^2 = (h^2) / (8 * m * (h * c) / (400 * 10^-9 m))

L^2 = (h * 400 * 10^-9 m) / (8 * m * c)

L = √((h * 400 * 10^-9 m) / (8 * m * c))

Plug in the values for h (6.626 * 10^-34 Js), m (9.109 * 10^-31 kg), and c (2.998 * 10^8 m/s):

L ≈ 2.09 * 10^-10 m

Therefore, the length of the one-dimensional box is approximately 2.09 * 10^-10 meters.

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#SPJ11

Answer:

13 (x= -2, y= 1)

14 (x=3, y= -4)

Step-by-step explanation:

1 x+5y=3

3x-2y=-8

u gonna add 3 into x and make it negative

2 -3x-15y=-9

3x-2y=-8

x will be gone since 3x-3x

3 -17y=-17

y= 1

going to add y into x+5y=3

x+5=3

x=-2

question 14

y=2x-10

y=-4x+8

add - to everything in the bottom

y=2x-10

-y=4x-8

0=6x-18

18=6x

3=x

add 3 into x in y=2x-10

y=6-10

y=-4