### Home > CC1MN > Chapter 8 > Lesson 8.2.5 > Problem 8-115

8-115.

Sketch the algebra-tile shape at right on your paper. Write an expression for the perimeter of the shape. Then find the perimeter for each of the given values of .

Find the perimeter as you did in problems 6-96 and 6-106, including as part of the expression.

Substitute in the expression of the perimeter.

Evaluate the expression.

Substitute

for in the expression of the perimeter and evaluate.units

See part (a) or (b).