-x-2y=9x+4y=9elimination

1 answer:

8 0

You add the second equation to the first which eliminates x and leaves you with 2y=18 so you divide 18 by 2 which is 9 so y=9 now you fill in one question for y so do x+4(9)=9 you get x+36=9 now subtract 36 from 9 and you get -27 so x=-27 and y=9

You might be interested in

Find the surface area of a sphere with a radius of 10 in. Express your answer in terms of π.

Sati [7]

Given:

Radius of the sphere = 10 in

To find:

The surface area of a sphere

Solution:

Surface area of sphere:

$SA =4\pi r^2$

$SA =4\times \pi \times 10^2$

$SA=\pi \times 400$

$SA=400\pi$ in²

The surface area of a sphere is 400π in².

4 0

3 years ago

Need help with number 2

Slav-nsk [51]

Luis is wrong because 8 to the third power is not 24, but is 512. He multiplied 8 by 3 instead of doing 8x8x8, so Luis made an incorrect claim.

5 0

3 years ago

Read 2 more answers

A square has a side length of 5 yards. What is its area in square feet? Use pencil and paper. Show two ways to find the answer.

igor_vitrenko [27]

5 × 5 = 25 square yards
25 × 3 = 75 square feet

5 0

3 years ago

Which is the measures of an exterior angle of a regular octagon? 40° or 45° or 50° or 55°

AleksandrR [38]

The answer is 45 degrees. Hope this helps!

3 0

4 years ago

Please help will mark brainliest!!

Oxana [17]

Answer:

find the area for the triangles then find the area of the rectangles and add them together and u have your answer do the same for both questions

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers