Answer
-1
Work Step by Step
$\frac{-18}{18}=-18\div18=-1$
In general, any number divided by its opposite will have a quotient of -1.
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0134467795
ISBN 13:
978-0-13446-779-5
Chapter 9 - Basic Algebra - 9.3 Multiplying and Dividing Signed Numbers - 9.3 Exercises - Page 645: 61
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