Answer
$15x^{13}$
Work Step by Step
RECALL:
$a^m \cdot a^n = a^{m+n}$
Multiply the numerical coefficients, then apply the rule above to the variable to obtain:
$=15x^{7+6}
\\=15x^{13}$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 1 - Review Exercises - Page 100: 90
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