the length of a rectangle is 3ft longer than its width if the perimeter is 30ft what is its area

Answer 1

P=30 = 2(L+W) = 2(W+3 + W) = 2(2W+3) = 4W + 6

4W+6 = 30

4W = 30-6 = 24

W = 24/4 = 6 feet

L=6+3 = 9 feet

A= LW = 9(6) = 54

Area = 54 square feet