Question

Please help, 20 points.
Perimeter :)

Answer 1

D. (42 - 2x)(32 - 2x) = 900

Explanation:

Look at the picture.

The dimensions of the picture:

(42 - 2x)in × (32 -2x)in

The formula of an area of a rectangle:

A = l · w

l - length, w - width

Substitute l = (42 - 2x), w = (32 - 2x) and A = 900

(42 - 2x)(32 - 2x) = 900