Review Exercises 95 13 122 182 5 172 20 Section 1.6 58. 59. 2 5 182 172 0 13 112 60. 61. Under what conditions will the expression be negative? a b 62. Richard’s checkbook was overdrawn by $45 (that is, his balance was 45). He deposited $117 but then wrote a check for $80.Was the deposit enough to cover the check? Explain. Section 1.5 For Exercises 63–75, subtract. 63. 64. 65. 66. 13 25 31 122 8 172 2 15 a 7 9 b 5 6 67. 68. 69. 70. 1 3 9 8 7 8.2 1.05 3.2 16.1 15.92 7.09 152 71. 72. 11 2 a 1 6 b 7 3 73. 74. 4 5 6 14 112 10 1212 5 7 10 a 75. 76. Under what conditions will the expression be negative? 13 20 b a b For Exercises 77–81, write an algebraic expression and simplify. 77. 18 subtracted from 7 78. The difference of 6 and 41 79. Seven decreased by 13 80. Five subtracted from the difference of 20 and 81. The sum of 6 and 12, decreased by 21 82. In Nevada, the highest temperature ever 7 125°F 50°F. recorded was and the lowest was Find the difference between the highest and lowest temperatures. (Source: Information Please Almanac) For Exercises 83–100, multiply or divide as indicated. 83. 101172 84. 17213 85. 1522 26 86. 1482 1162 87. 88. 21 5 89. 90. 0 1142 10.452152 91. 92. 93. 94. 152122132 1621521152 95. 96. 1 2 97. 98. 99. 100. For Exercises 101–106, perform the indicated operations. 101. 9 43214 82 513 12 4 102. 103. 104. 105. 106. For Exercises 107–110, evaluate each expression given the values x 4 and y 9. 107. 31x 22 y 108. 1x y 109. xy 110. 3x 2y 111. In statistics, the formula x m zs is used to find cutoff values for data that follow a bellshaped curve. Find xif ,and s 15. m 100, z 1.96 08 5 0 252 32 5 33 1422 4 36 122132 5.4 10.322 0.09 2 3 a 3 8 5 6 b 5 3 8132 6 7 122 10 11 7 11 5 9 40 4 152 a 12 13 b a 1 6 b a 13 14 a b a b 7 8 b a 4 7 b 13 52 21 14 3 4 0 0 2 3 a 12 11 b 7 4 a 21 2 b
miller_beginning_intermediate_algebra_4e_ch1_3
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