#### Answer

13y$^3$-8y$^2$+7y-5

#### Work Step by Step

Combine like terms to simplify.
(9y$^3$-7y$^2$+5)+(4y$^3$-y$^2$+7y-10)
(9y$^3$+4y$^3$)+(-7y$^2$-y$^2$)+(7y)+(5-10)
13y$^3$-8y$^2$+7y-5

Published by
Pearson

ISBN 10:
0-13417-805-X

ISBN 13:
978-0-13417-805-9

13y$^3$-8y$^2$+7y-5

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