Answer
1
Work Step by Step
The inverse property of multiplication holds that $a\times\frac{1}{a}=1$ (for some real number $a$).
Therefore, $-\frac{9}{8}(-\frac{8}{9})=-\frac{9}{8}\times-\frac{8}{9}=\frac{9\times8}{8\times9}=\frac{72}{72}=1$.
Intermediate Algebra (12th Edition)
by Lial, Margaret L.; Hornsby, John; McGinnis, Terry
Published by
Pearson
ISBN 10:
0321969359
ISBN 13:
978-0-32196-935-4
Chapter R - Section R.4 - Properties of Real Numbers - R.4 Exercises - Page 38: 50
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