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Home > CC1 > Chapter 8 > Lesson 8.3.2 > Problem 8-103

8-103.
  1. Rewrite each expression with an equivalent expression. Then evaluate each expression for x = 3 and y = 1. Homework Help ✎

    1. 3x(5y − 4)

    2. 7y2 + 28y

    3. (2x − 1) + (4x − 3)

Multiply what is within the parentheses by what lies on the outside.

15xy − 12x

Substitute in the known values.

15(3)(1) − 12(3)

9

Factor out the 7y.

First combine like terms to write an equivalent expression.
Then substitute in the known values.

14