Page 774 - Basic College Mathematics with Early Integers

A6 ANSWERS TO SELECTED EXERCISES

2 9 3 2 13 1 15 5 1
69. -5 - x 71. 1 # x 73. 3 mi 75. 9 in. 77. 7 in. 79. 3 sq yd 81. sq in. 83. 21 m 85. no; it will be ft short
7 10 16 5 20 2 16 24 12
2 3 4 3 7 59 2 23 73
87. 4 m 89. 9 min 91. 1 min 93. -10 95. -24 97. -13 99. 4 101. -1 103. 105. 4 107. 167 109. a, b, c
3 4 5 25 8 60 7 24 1000
111. Incorrect; to divide mixed numbers, first write each mixed number as an improper fraction. 113. answers may vary 115. answers may vary
Answers to Selected Exercises
117. answers may vary
Chapter 3 Vocabulary Check 1. reciprocals 2. composite number 3. equivalent 4. improper fraction 5. prime number 6. simplest form
7. proper fraction 8. mixed number 9. numerator; denominator 10. prime factorization 11. undefined 12. 0 13. like 14. least common
denominator 15. complex fraction 16. cross products

2 4 7 1 13 1 11
Chapter 3 Review 1. proper 2. improper 3. proper 4. mixed number 5. 6. 7. or 2 8. or 3 9. 10. a. 108
6 7 3 3 4 4 12
108
b. 11. -1 12. 1 13. 0 14. undefined 15. 7 16. 4
131 9 7
0 1 0 1
3
# #
#
# #
17. 5 18. 7 19. 2 2 # 17 20. 2 3 2 5 21. 5 157 22. 3 5 17 23.
4 5 7
0 1 2 0 1 2
5 1 1 29 18 2 3 3 5 5 1
24. 25. - 26. - 27. 28. 29. 8 30. 6 31. ft 32. of the cars 33. no 34. yes 35. - 36. 37. 9 38. 39. -
9 3 2 32 23 3 5 10 14 3 27
25 2 63 1 23 15 5 27 12 15 77 4 10 2 1
40. 41. 42. - 43. 44. 45. -2 46. 47. - 48. 49. 50. - 51. sq ft 52. sq m 53. 54. 55. -
144 15 10 7 14 4 6 2 7 2 48 9 11 3 3
4 1 1 3 3 11 7
56. 57. 58. - 59. 21 60. 24 61. 20 62. 35 63. 49 64. 45 65. 40 66. 10 67. of his homework 68. mi 69. 70.
5 21 15 4 2 18 26
1 5 15 7 91 5 19 3 21 1
71. - 72. - 73. - 74. 75. 76. 77. m 78. ft 79. of the donors 80. yd 81. 6 82. 7 83. 7 84. 6
12 12 14 36 150 18 9 2 50 4
4 3 4 3 3 1 11 35 8 1 29 1
85. 86. 87. -2 88. -7 89. 90. - 91. 3 92. 3 93. 1 94. 31 95. 96. 97. 98. - 99. 100. -
7 11 9 10 4 4 5 9 13 27 110 7
16 7 19 51 1 5 1 29 2
101. 45 102. 20 103. 4 104. 2 105. Exact: 5 106. Exact: 5 107. 5 108. 2 109. 22 mi 110. 36 g
21 24 35 55 5 11 4 46 3
Estimate: 6 Estimate: 8
1 7 5 33 5 15 7 1 27 1
111. each measurement is 4 in. 112. yd 113. -27 114. - 115. 1 116. -3 117. 118. 119. 9 120. or 13
4 10 14 40 27 16 12 4 2 2
1 1 11 27 3 1 2 5 3 16 1
121. 122. 123. 124. 125. Exact: 10 126. Exact: 12 127. 2 128. 6 129. 13 130. 12 131. 3 132. 8
6 5 12 55 4 3 5 12 8 35 21
Estimate: 8
Estimate: 12
11 1 1 7 47 1 1
133. 134. 135. - 136. 6 lb 137. in. 138. 44 yd 139. 40 sq ft
25 144 12 20 61 2 2
7 23 3 4 3 8 2
Chapter 3 Test 1. 2. 3. 18 4. 5. - 6. not equivalent 7. equivalent 8. 2 2 # # 9. 3 2 # # 10. 72 11. 12. -
5 11
3 7
16 3 4 35 5 9 3
4 1 4 8 13 16 1 7 4 3 1 8 64 1
13. or 1 14. - 15. 16. 17. 18. 16 19. 20. 21. 22. 9 23. 24. 14 25. 16 26. or 21
3 3 3 21 24 45 7 50 11 4 40 11 3 3
1 5 2 9 3 11 76 5 1 4 3 23 13
27. 22 28. - or -1 29. 30. 31. 32. 33. or 2 34. 35. 3 ft 36. 37. 38. $2820
2 3 3 16 8 12 21 2 2 31 4 50 50
1 2
39. perimeter: 3 ft; area: sq ft 40. 24 mi
3 3
Cumulative Review 1. one hundred twenty-six; Sec. 1.2, Ex. 5 2. one hundred fifteen; Sec. 1.2 3. twenty-seven thousand thirty-four; Sec. 1.2, Ex. 6
4. six thousand five hundred seventy-three; Sec. 1.2 5. 159; Sec. 1.3, Ex. 1 6. 631; Sec. 1.3 7. 514; Sec. 1.4, Ex. 3 8. 933; Sec. 1.4
9. 278,000; Sec. 1.5, Ex. 2 10. 1440; Sec. 1.5 11. 57,600 megabytes; Sec. 1.6, Ex. 11 12. 1305 mi; Sec. 1.6 13. 7089 R 5; Sec. 1.7, Ex. 7.
2
3
14. 379 R 10; Sec. 1.7 15. 7 ; Sec. 1.9, Ex. 1 16. 7 ; Sec. 1.9 17. 3 4 # 17 3 ; Sec. 1.9, Ex. 4 18. 9 4 # 5 2 ; Sec. 1.9 19. 8; Sec. 2.1, Ex. 2
20. 52; Sec. 2.1 21. -6824 ; Sec. 2.2, Ex. 1 22. -21 ; Sec. 2.2 23. -4 ; Sec. 2.3, Ex. 3 24. 5; Sec. 2.3 25. 3; Sec. 2.4, Ex. 9 26. 10; Sec. 2.4
# #
# #
27. 25; Sec. 2.5, Ex. 8 28. -16 ; Sec. 2.5 29. -2 ; Sec. 2.6, Ex. 5 30. 25; Sec. 2.6 31. 3 3 5 or 3 2 # 5 ; Sec. 3.2, Ex. 1 32. 2 2 23 or 2 2 # 23 ; Sec. 3.2
10 2 1 3 2 38
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33. ; Sec. 3.3, Ex. 1 34. ; Sec. 3.3 35. ; Sec. 3.3, Ex. 2 36. ; Sec. 3.3 37. ; Sec. 3.1, Ex. 3 38. 2 2 # # ; Sec. 3.2 39. a.
33 35 8 25 5 9
19 39 7 2 11 8 2
b. ; Sec. 3.6, Ex. 8 40. ; Sec. 3.6 41. ; Sec. 3.2, Ex. 5 42. ; Sec. 3.2 43. 2 ; Sec. 3.7, Ex. 2 44. or 2 ; Sec. 3.7
11 5 11 3 12 3 3
5 11
45. ; Sec. 3.3, Ex. 10 46. ; Sec. 3.7
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