Answer
$\frac{3}{2}$
Work Step by Step
Let $x=2$ and $y=-1$. Then by substitution, we have
$$
-3x^{-1}y=-3(-1)(2)^{-1}=\frac{3}{2}
.$$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Appendix A - Review - A.1 Algebra Essentials - A.1 Assess Your Understanding - Page A12: 106
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