Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 1 - Section 1.4 - Adding Real Numbers - Practice: 12


a. -2, b. -21

Work Step by Step

a. $16+(-9)+(-9)=16-9+(-9)=7+(-9)=7-9=-2$ b. $[3+(-13)]+[-4+(-7)]=[3-13]+[-(4+7)]=[-10]+[-(11)]=[-10]+[-11]=-(10+11)=-(21)=-21$
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