The perimeter of a rectangle is 90 ft. Find the dimensions of the rectangle if the ratio of the length to the width is 8: 7. Which of the following would be the best equation to use to solve this problem?

8x = 7x = 90
8x + 8x + 7x + 7x= 90
8x/7x = 90
2x + 2x=90

Question

The perimeter of a rectangle is 90 ft. Find the dimensions of the rectangle if the ratio of the length to the width is 8: 7. Which of the following would be the best equation to use to solve this problem?

8x = 7x = 90
8x + 8x + 7x + 7x= 90
8x/7x = 90
2x + 2x=90

anonymous · Answer

8x + 8x + 7x + 7x = 90

Because the ratio of the length to width is 8:7, you can represent the length as 8x and the width as 7x.

Then take the equation of the perimeter of a rectange:

2(length) + 2(width) = 90
2(8x) + 2(7x) = 90    <----------- substitute
16x + 14x = 90

kailanineon · Answer

Thanks :) That's what I thought it was

anonymous · Answer

No problem, glad I could help!

kailanineon · Answer

I appreciate it!