Answer
$1$
Work Step by Step
The given expression, $
\left( \dfrac{-9}{5} \right)\left( \dfrac{5}{-9} \right)
$, simplifies to
\begin{array}{l}
\dfrac{-9(5)}{5(-9)}
\\\\=
\dfrac{-45}{-45}
\\\\=
1
.\end{array}
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 1 - Introduction to Algebraic Expressions - 1.7 Multiplication and Division of Real Numbers - 1.7 Exercise Set - Page 58: 105
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