Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 1 - Foundations for Algebra - 1-5 Adding and Subtracting Real Numbers - Practice and Problem-Solving Exercises: 70

Answer

-3

Work Step by Step

We begin by following the instructions to plug -4 in for a and 7 in for b. Thus, we obtain: $-7-(-4) $ A key rule to remember is that subtracting a negative is the same as addition. Thus, it follows: $-7-(-4)=-7+4$ We must recall that a negative becomes more positive when a positive number is added to it. Therefore, we find: $-7+4=-3$
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