CPM Homework Help : CC1 Problem 8-103

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8-103.

Rewrite each expression with an equivalent expression. Then evaluate each expression for $x=3$ and $y=1$ .

$3x(5y−4)$
Step 1 (a):
Multiply what is within the parentheses by what lies on the outside.
$15xy − 12x$
Step 2 (a):
Substitute in the known values.
$15(3)(1) − 12(3)$
Answer (a):
$9$

$7y^2+28y$
Hint (b):
Factor out the $7y$ .

$(2x−1)+(4x−3)$

Hint (c):
First combine like terms to write an equivalent expression.
Then substitute in the known values.

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