### Home > CC1 > Chapter 6 > Lesson 6.2.5 > Problem 6-115

6-115.

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 *x* 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).