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Home > CC1 > Chapter Ch6 > 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 x. Homework Help ✎

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

P = 4x + 4

algebra tiles

Substitute 7 for x in the expression of the perimeter.

Evaluate the expression.
4(7) + 4 = ?

32 units

  • Substitute 5.5 for x in the expression of the perimeter and evaluate.

    26 units

  • See part (a) or (b).