Question

The width of a rectangle is one more than twice its length. If the rectangle's perimeter is 44 cm, then its length is ____ cm.

$1,100 invested for one year pays a return of $121. What is the rate of return?

Answer 1

L = 7

Explanation:

W = 2L + 1

P = 44

44 = 2(L +W)

44 = 2(L +2L + 1)

44 = 2L +4L + 2

44 = 6L + 2

42 = 6L

L = 7

W = 2(7) + 1

W = 14 + 1

W = 15

1100 = 100%

121 = X

121*100=1100X

12100 = 1100X

X = 12100/1100

X = 11%