Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Appendix A - A.1 - Algebraic Expressions - Exercises - Page 543: 5d

Answer

$= -12$

Work Step by Step

$= (-5) + (-7)$ $= -5 - 7$ $= -12$
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