Question

The perimeter of a rectangular is 96 ft. The ratio of the length to the width is 7:5. What are the dimensions of the rectangle

A. 2x + 2x = 96
B. 7x + 5x = 96
C. 7x + 7x + 5x + 5x = 96
D. 7x/5x = 96

Answer 1

let the length is x and the width is y

2x+2y = 96

x/y=7/5 ----> x=7y/5 (substitute in the first equation

2(7y/5) + 2y = 96

14y/5 + 2y =96 (multiply by 5)

14y + 10y = 480

y = 20

x = 28

Answer 2

2x + 2x = 96

I did the test.