CPM Homework Help : MC1 Problem 9-91

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9-91.

Evaluate the expressions below using $r = 3$ and $h = 5$ .

$6h - 4$
Hint (a):
Look at the Math Notes box below for help getting started on this problem.
Answer (a):
$6\left(5\right) − 4 = 26$

$8r + h$
Hint (b):
Remember that $8r$ means $8$ r's or $\left(8\right)\left(r\right)$ .
Answer (b):
$29$

$r^{2}$
Hint (c):
Remember that the exponent (the two) means that you will multiply $r$ by itself.

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