Question

I dont know how yo do this question

Answer 1

4 or 10 inches

Explanation:

I added a photo of my solution

Answer 2

Explanation:

2x + 2y = 28 <=====given

x * y = 40 <===given ..... re-arrange to :

y = 40 / x <===substitute this 'y' into the first equation

2x + 2 ( 40/x) = 28 <=====solve for x

2x^2 -28x + 80 = 0

x^2 -14x +40 = 0

(x -10)(x-4) = 0 shows x = 10 or 4 then y = 4 or 10

dimensions 10 and 4 inches