Answer
-14
Work Step by Step
Replace r with -7.
Replace s with 0.
2(-7) + 4(0)
Using the order of operations, do all multiplications first. Then addition.
= (-14) + (0)
= -14+0
= -14
Basic College Mathematics (9th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0321825535
ISBN 13:
978-0-32182-553-7
Chapter 9 - Basic Algebra - 9.5 Evaluating Expressions and Formulas - 9.5 Exercises - Page 662: 10
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