Question

The perimeter of the triangle below is 55 units. Find the length of side QR.

Write your answer without variables.

Answer 1

QR = 8

Explanation:

• find y with an equation

5y+y+3+4y+2=55

10y=55-3-2

10y=50

y=50:10

y=5

• find QR

QR = y+3

5+3=8