the length of a rectangle is 5 feet less than three times the width. if the perimeter is 30 feet. find the length and the width of the rectangle .

Answer 1

L=3W-5

P = 30 = 2W+2L = 2W + 2(3W-5) = 2W + 6W -10 = 8W -10

8W - 10 = 30

8W = 40

W = 40/8 = 5 feet

L = 3(5)-5 = 15-5 = 10 feet

the rectangle is 5 by 10 feet

Answer 2