Page 186 - Basic College Mathematics with Early Integers

CHAPTER 2 REVIEW 163

Answer true or false for each statement.

67. ƒ -5 ƒ - ƒ -6 ƒ = 5 - 6 68. ƒ -5 - (-6) ƒ = 5 + 6

69. If b 7 a, then b - a is a positive number. 70. If b 6 a, then b - a is a negative number.

(2.5) Multiply.

71. -3(-7) 72. -6(3) 73. -4(16) 74. -5(-12)

75. (-5) 2 76. (-1) 5 77. 12(-3)(0) 78. -1(6)(2)(-2)

Divide.

-24 0 -46
79. -15 , 3 80. 81. 82.
-8 -3 0

100 -72 -38 45
83. 84. 85. 86.
-5 8 -1 -9

87. A football team lost 5 yards on each of two consecu- 88. A race horse bettor lost $50 on each of four consecu-
tive plays. Represent the total loss by a product of tive races. Represent the total loss by a product of
integers, and find the product. integers, and find the product.

For Exercises 89 through 92, use the map at the beginning of this Chapter Review.

89. The low temperature for Bucharest, Romania, is 90. The low temperature for Geneva, Switzerland, is the
2 times the low temperature for Raleigh, North same as the low temperature for Miami, Florida,
Carolina. Find the low temperature for Bucharest. divided by -10. Find the low temperature for Geneva.

91. The low temperature for Capetown, South Africa, is 92. The low temperature for Stockholm, Sweden, is
the same as the low temperature for Barrow,Alaska, 2 times the low temperature for Providence, Rhode
divided by -2. Find the low temperature for Island. Find the low temperature for Stockholm.
Capetown.

(2.6) Simplify.

93. (-7) 2 94. -7 2 95. -2 5 96. (-2) 5

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97. 5 - 8 + 3 98. -3 + 12 + (-7) - 10 99. -10 + 3 (-2) 100. 5 - 10 (-3)