#### Answer

-9, 9

#### Work Step by Step

The additive inverse of a number $a$ is $-a$. Therefore, the additive inverse of 9 is $-(9)=-9$.
The absolute value of a number $a$ is equal to $a$ if $a\geq0$ and is equal to $-a$ if $a\lt0$. Therefore, $|9|=9$.

Published by
Pearson

ISBN 10:
0321969359

ISBN 13:
978-0-32196-935-4

-9, 9

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