Page 771 - Basic College Mathematics with Early Integers

ANSWERS TO SELECTED EXERCISES A3

29. 6 31. 5 33. 8 35. 0 37. 5 39. -5 41. 4 43. -23 45. 10 47. 7 49. -20 51. -3 53. 8 55. 14 57. 29 59. 8 61. -3 63. 23
65. -4 67. 7 69. 6 71. = 73. 6 75. 7 77. 6 79. 7 81. 6 83. 25; -25 85. 84; 84 87. Caspian Sea 89. Lake Superior
2
91. iodine 93. oxygen 95. 13 97. 35 99. 360 101. - ƒ -8ƒ, - ƒ3ƒ, 2 , -1-52 103. - ƒ -6ƒ, - ƒ1ƒ, ƒ -1ƒ, -1-62 105. -10, - ƒ -9ƒ, -1-22, ƒ -12ƒ, 5 2
107. d 109. 5 111. false 113. true 115. false 117. answers may vary
Section 2.3
Calculator Explorations 1. -159 3. 44 5. -894,855
Vocabulary and Readiness Check 1. 0 3. a 5. 5 7. -35 9. 0 11. 0
Exercise Set 2.3
1. 3. 4 5. 13 7. 35 9. -8 11. 0
6 1
7 7
8 7 6 5 4 3 2 1 0 1
5 4 3 2 1 0 1 2 3 4 16 14 12 10 8 6 4 2 0 2 Answers to Selected Exercises
13. 4 15. 2 17. -2 19. -9 21. -24 23. -57 25. -223 27. 0 29. 7 31. -3 33. -9 35. 30 37. 20 39. 51 41. -33 43. -20
45. -125 47. -7 49. -246 51. 16 53. 13 55. -33 57. -21 59. 21 61. -45 63. 9 65. 0 67. 0 69. -103 71. -70 73. 3
75. -21 77. 17 79. -10 81. 0 + (-215) + (-16) =-231 ; 231 ft below the surface 83. Stanford: -2 ; Wie: +1 85. $3,496,000,000
87. $1,397,000,000 89. 2°C 91. -$12,198 93. -40°F 95. -7679 m 97. 44 99. 141 101. answers may vary 103. -3 105. -22 107. true
109. false 111. answers may vary
Section 2.4
Vocabulary and Readiness Check 1. a + (-b) ;b 3. -10 - (-14) ;d 5. 0 7. 0
Exercise Set 2.4 1. 0 3. 5 5. -5 7. 14 9. 3 11. -18 13. -14 15. -33 17. 402 19. -14 21. -4 23. -7 25. -42 27. -17
29. 13 31. -38 33. -11 35. -127 37. -11 39. 2 41. 0 43. -1 45. -27 47. 40 49. -22 51. -8 53. 14 55. -11 57. 31
59. 12 61. 20 63. 389°F 65. 7°F 67. 265°F 69. -$16 71. -12°C 73. 154 ft 75. 69 ft 77. 652 ft 79. 144 ft
81. - $700 billion 83. -5 + x 85. -20 - x 87. 5 89. 1058 91. answers may vary 93. 16 95. -20 97. -4 99. 0 101. -12
103. false 105. answers may vary
Integrated Review 1. +29,028 2. -35,840 3. -7 4. 5. 7 6. 6 7. 6 8. 7 9. 1 10. -4 11. 8
4 3 2 1 0 1 2 3 4
12. 5 13. -6 14. 3 15. -89 16. 0 17. 5 18. -20 19. -10 20. -2 21. 52 22. -3 23. 84 24. 6 25. 1 26. -19 27. 12 28. -4
29. -44 30. b, c, d 31. a, b, c, d 32. 10 33. -12 34. 12 35. 10 36. 56 37. -34
Section 2.5
Vocabulary and Readiness Check 1. negative 3. positive 5. 0 7. undefined
Exercise Set 2.5 1. 6 3. -36 5. -64 7. 0 9. -48 11. -8 13. 80 15. 0 17. -15 19. -9 21. -27 23. -25 25. -8 27. -4
29. -5 31. 8 33. 0 35. undefined 37. -13 39. 0 41. -12 43. -54 45. 42 47. -24 49. 16 51. -2 53. -7 55. -4 57. 48
59. -1080 61. 0 63. -5 65. -6 67. 3 69. -1 71. -243 73. 180 75. 1 77. -20 79. -966 81. -2050 83. -28 85. -18
87. 25 89. -1 91. undefined 93. 6 95. 8; 2 97. 0; 0 99. -6 101. 252 103. -71 # x or -71x 105. -16 - x 107. -29 + x
x
#
109. or x , (-33) 111. 3 (-4) =-12 ; a loss of 12 yd 113. 5(-20) =-100 ; a depth of 100 feet 115. -210°C 117. -189°C
-33
119. - $6.3 million 121. a. -1872 movies b. -936 movies per year 123. 109 125. 8 127. -29 129. -19 131. -8 133. negative
17 17 12 12
135. 1-52 , 1-22 , 1-22 , 1-52 137. answers may vary
Section 2.6
Calculator Explorations 1. 48 3. -258
Vocabulary and Readiness Check 1. division 3. average 5. subtraction 7. base: 3; exponent: 2 9. base: 4, exponent: 1; base: 2; exponent: 3
11. base: -7; exponent: 5 13. base: 5; exponent: 7; base: 10; exponent: 1
Exercise Set 2.6 1. -64 3. -64 5. 24 7. -1 9. -7 11. -14 13. -43 15. -8 17. -13 19. -1 21. 4 23. -3 25. -55 27. 8
29. 16 31. 13 33. -77 35. 64 37. 452 39. 129 41. 3 43. -4 45. 4 47. 16 49. -27 51. 34 53. 65 55. -59 57. -7 59. -61
61. -11 63. 36 65. -117 67. 30 69. -3 71. -59 73. -30 75. 1 77. -12 79. 0 81. -20 83. 9 85. -16 87. 1 89. -50
#
#
#
91. -2 93. -19 95. 19 97. -5 99. no; answers may vary 101. 4050 103. 45 105. 32 in. 107. 30 ft 109. 2 17 - 52 3 111. -6 110 - 42
113. no; answers may vary 115. answers may vary 117. 20, 736 119. 8900 121. 9
Chapter 2 Vocabulary Check 1. opposites 2. signed 3. absolute value 4. integers 5. variable 6. negative 7. positive
10
Chapter 2 Review 1. 5 2. 17 3. undefined 4. 0 5. 121 6. 2 7. 4 8. 20 9. x - 5 10. x + 7 11. 10 , x or 12. 5x 13. -1435
x
14. +7562 15. 16. 17. 12 18. 0 19. -6 20. 9 21. -9 22. 2 23. 7
8 6 4 2 0 2 4 6 810 8 6 4 2 0 2 4 6 8
24. 6 25. 7 26. 7 27. 12 28. -3 29. false 30. true 31. true 32. true 33. 2 34. 14 35. 4 36. 17 37. -23 38. -22 39. -21
40. -70 41. 0 42. 0 43. -151 44. -606 45. -20°C 46. -150 ft 47. -9 48. +1 or 1 49. 99°F 50. 112°F 51. 8 52. -16 53. -11
54. -27 55. 20 56. 8 57. 0 58. -32 59. 0 60. -7 61. -10 62. -9 63. -25 64. 692 ft 65. -3°F 66. -4°F 67. true 68. false
69. true 70. true 71. 21 72. -18 73. -64 74. 60 75. 25 76. -1 77. 0 78. 24 79. -5 80. 3 81. 0 82. undefined 83. -20
84. -9 85. 38 86. -5 87. (-5)(2) =-10 88. (-50)(4) =-200 89. -18°F 90. -3°F 91. 28°F 92. -26°F 93. 49 94. -49 95. -32
96. -32 97. 0 98. -8 99. -16 100. 35 101. -28 102. -44 103. 3 104. -1 105. 7 106. -17 107. 39 108. -26 109. 7
110. -80 111. -2 112. -12 113. -3 114. -35 115. -5 116. 5 117. -1 118. -7 119. 4 120. -4 121. 3 122. 108 123. 16