Chapter 9 - XYZ Custom Plus

530
Chapter 9 Solving Equations and Inequalities
Getting Ready for the Next Section
Find the reciprocal of each number.
57. 4 58. 3 59. 1 } 2
60. 1 } 3
61.
2
} 3
62.
3
} 5
Multiply.
63. 2 ? 1 } 2
64. 1 } 4
? 4
65. 2 1 } 3
(23)
66. 2 1 } 4
(24)
67. 3 } 2 1 2 } 3 2
68. 5 } 3 1 3 } 5 2
69.
1 2 5 } 4 21 2 4 } 5 2
70.
1 2 4 } 3 21 2 3 } 4 2
Simplify.
71. 1 ? x 72. 1 ? a 73. 4x 2 11 1 3x 74. 2x 2 11 1 3x
Maintaining Your Skills
Add or subtract as indicated.
75.
79.
3
} 2
1 5 } 10
76.
1
} 2 } 2 3 5
80.
1
} 3
1 4 } 12
77.
3
} 2 } 3 81.
4 7
2
} 7
1 1 } 14
78.
1
} 2 } 4 82.
6 3
3
} 8
1 1 } 16
2
} 5
2 5 } 10
Translating Translate each of the following into an equation, and then solve the equation.
83. The sum of x and 12 is 30.
84. The difference of x and 12 is 30.
85. The difference of 8 and 5 is equal to the sum of x and 7.
86. The sum of 8 and 5 is equal to the difference of x and 7.