Solve the following system of equations for x and y.

Mathematics

1 answer:

Mademuasel [1]3 years ago

4 0

<h2>Answer:</h2>

We can solve this system by elimination to solve for y by multiplying the top equation by 4 and the bottom one by -5.

$4(5x + y = 2)\\-5(4x - 2y = 10)\\\\20x + 4y = 8\\-20x + 10y = -50\\\\14y = -42\\\\y = -3$

Now, with what we got for y, we plug it back into one of the original equations. I chose the top one.

$5x + 7 = 2\\\\5x = -5\\\\x = -1$

Now we have the solution of this system

The solution is A. (-1, -3).

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is what I presume you actually meant. 

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corrected question:

A rectangle and a square have the same perimeter. One side-length of the rectangle is 25% longer than the other. What is the ratio between the areas of the rectangle and the square?

Answer:

ratio of area of recatngle to square= 0.9879

Step-by-step explanation:

perimeter of rectangle = 2(L+B)

perimeter of a square = $4L_(s)$