Algebra: A Combined Approach (4th Edition)

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

Chapter 1 - Section 1.6 - Multiplying and Dividing Real Numbers - Practice - Page 57: 15

Answer

a. 0 b. 43 c. -21 d. -6 e. -4

Work Step by Step

a. $\frac{0(-5)}{3}$ $\frac{0}{3}$ $0\div3=0$ b. $-3(-9)-4(-4)=$ $(-3\times-9)-(4\times-4)=$ $(27) - (-16)=$ $27+16=43$ c. $(-3)^{2} +2[(5-15) - |-4-1|]=$ $(-3)^{2} + 2[(-10) - |-5|]=$ $(-3)^{2} +2[-10-5]=$ $(-3)^{2} + 2[-15]=$ $((-3)(-3)) - 30=$ $9-30= -21$ d. $\frac{-7(-4)+2}{-10-(-5)}=$ $\frac{28+2}{-10+5}=$ $\frac{30}{-5}=$ $30\div-5= -6$ e. $\frac{5(-2)^{3}+52}{-4+1}=$ $\frac{5(-8)+52}{-4+1}=$ $\frac{-40+52}{-4+1}=$ $\frac{12}{-3}=$ $12\div-3=-4$
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