Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 1 - Foundations for Algebra - 1-5 Adding and Subtracting Real Numbers - Standardized Test Prep: 70

Answer

B: -3

Work Step by Step

$-b-a\longrightarrow$ substitute the given values for each variable $=-7-(-4)\longrightarrow$ change subtraction to addition be reversing the sign of the following term $=-7+4\longrightarrow$ when adding a negative term to a positive term, subtract the absolute values; the sign of the sum is negative since the negative addend has the greater absolute value. $=-(|-7|-|4|)\longrightarrow$ simplify absolute values $=-(7-4)\longrightarrow$ subtract $=-3$
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