Question

The perimeter of the rectangle below is 88 units. Find the length of side QR.

Write your answer without variables.

Answer 1

Answer: QR = 21 Units

P = 2(l) + 2(w)

`88= 2(4z-1) + 2(3z+3)`

`88 = 8z-2+6z+6`

`88 +2-6= 8z+6z`

`84=14z`

`(84)/(14) =(14z)/(14)`

`6 = z`

`QR = 3z+3`

`QR = 3(6) +3`

QR = 21 Units