Question

Use the formula P = 2l + 2w to find the length of a rectangle whose perimeter is 57 inches and whose width is 13 inches.

Answer 1

P = 2L + 2w
57 = 2L + 2(13)
57 = 2L + 26
-26       -26
31 = 2L
2      2
15.5 = L