Answer
$-4$
Work Step by Step
Substituting $
a
$ with $
-5
$, then the given expression, $
-100\div a^2
$, evaluates to
\begin{array}{l}
-100\div (-5)^2
\\\\=
-100\div 25
\\\\=
-4
.\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 - 1.8 Exponential Notation and Order of Operations - 1.8 Exercise Set - Page 66: 72
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