Question

a triangle has side lengths of (3q + 1) centimeters, (5q - 3) centimeters, and (r - 9) centimeters. which expression represents the perimeter, in centimeters, of the triangle? answer 8q - 11 + r -8r + 2 + 4q -8r + 6q -2 + 8q - 8r submit answer

Explanation:

Step1: Recall perimeter formula

Perimeter = sum of side - lengths.

Step2: Add side - lengths

$(3q + 1)+(5q - 3)+(r - 9)=3q+1 + 5q-3+r - 9$.

Step3: Combine like - terms

$(3q + 5q)+r+(1 - 3 - 9)=8q+r - 11$.

Answer:

$8q - 11 + r$