Answer
The student used a minus sign.
Work Step by Step
When writing negative four, the student used a minus sign instead of using the negative (-) button on the calculator. If this were done, the result would have been -57.
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 1, Equations and Inequalities - 1.2 Evaluate and Simplify Algebraic Expressions - Graphing Calculator Activity - Practice - Page 17: 13
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