That both sides are 5 what is the length

7 inches

Step-by-step explanation:

I cant see the illustration, but I will assume it is a rectangle. The formula for the perimeter of a rectangle is P=2w+2l

let P represent the perimeter of the window in inches

let w represent the width of the window in inches

let l represent the length of the widow in inches

(L is l whereas one is 1)

So we know w=5 and P=24

This lets us have the equation 24= 2 x 5 + 2l

24=10 + 2l

14=2l

7=l

answer is y=5x-15 for the parallel line