length = 5x width = x area = 125 A = L*W 125 = (5x)(x) 125 = 5x^2 125/5 = x^2 25 = x^2 sqrt{25} = sqrt{x^2} 5 = x The width is 5 feet. The length is 5 times 5 feet or 25 feet. To find the perimeter, we use P = 2L + 2W. P = 2(25) + 2(5) P = 50 + 10 P = 60 feet. Done!
