Chapter 9 - XYZ Custom Plus

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Chapter 9 Solving Equations and Inequalities
Simplify.
105. x 1 0 106. y 1 0 107. y 1 4 2 6 108. y 1 6 2 2
Maintaining Your Skills
Give the opposite of each number.
109. 9 110. 12 111. 26 112. 25
Problems 113–118 review material we covered in Chapter 1. Match each statement on the left with the property that justifies
it on the right.
113. 2(6 1 5) 5 2(6) 1 2(5)
114. 3 1 (4 1 1) 5 (3 1 4) 1 1
115. x 1 5 5 5 1 x
a. Distributive property
b. Associative property
c. Commutative property
d. Commutative and associative properties
116. (a 1 3) 1 2 5 a 1 (3 1 2)
117. (x 1 5) 1 1 5 1 1 (x 1 5)
118. (a 1 4) 1 2 5 (4 1 2) 1 a
Perform the indicated operation.
119. 2 } 5 } 4 1 8 120. 2 }
15 2
4 } 3 1 6 5 2
122. 6 4 } 3 2
123.
5
} 3
2 3 } 4
121. 12 4 2 } 3
124.
3
} 5
2 5 } 8