Algebra 1

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

Chapter 1 - Foundations for Algebra - 1-9 Patterns, Equations, and Graphs - Mixed Review - Page 66: 58

Answer

-30

Work Step by Step

$-18-12=-18+(-12)=-(|-18|+|-12|)=-(18+12)=-30$ Change subtraction to addition by changing the operator and reversing the sign of the following term. Add the absolute values. Since both terms are negative, the sum is negative.
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