Page 773 - Basic College Mathematics with Early Integers
P. 773
ANSWERS TO SELECTED EXERCISES A5
Section 3.4
a
Vocabulary and Readiness Check 1. like; unlike 3. - 5. least common denominator (LCD) 7. unlike 9. like 11. like 13. unlike
b
3 1 2 1 1 13 7 1 6 3 3 10 4 19
Exercise Set 3.4 1. 3. 5. 7. - 9. - 11. 13. 15. - 17. 19. 21. 1 23. 25. - 27. 29. -
7 5 3 4 2 11 13 9 11 5 4 3 5 33
13 9 13 3 5 2 7 2 7 1
31. 33. 35. - 37. - 39. 41. 43. 1 in. 45. 2 m 47. mi 49. 51. 53. 55. 45 57. 72 59. 150
21 10 14 4 4 5 10 5 25 50
54 50 46 50 15 65 45 52 60 61 48 50
61. 168 63. 126 65. 168 67. 14 69. 20 71. 25 73. 56 75. 8 77. 20 79. ; ; ; ; ; ; ; ; ; ; ;
100 100 100 100 100 100 100 100 100 100 100 100
2 9 11
81. drugs, health and beauty aids 83. 9 85. 81 87. 24 89. + = 91. answers may vary 93. 1; answers may vary 95. 814
7 7 7
97. answers may vary 99. a, b, and d
3 5 1 73 Answers to Selected Exercises
Integrated Review 1. 2. or 1 3. 4. 5. -1 6. 17 7. 0 8. undefined
7 4 4 85
1 6 14 9 2 3 11 7
2
9. 5 # 13 10. 2 # 5 # 7 11. 3 # 5 # 7 12. 3 2 # 7 2 13. 14. 15. - 16. - 17. 18. 19. 20. 21. not equivalent
7 5 15 10 5 8 14 11
1 24 51 94 28 55 40 6 3
22. equivalent 23. a. b. 48 c. 24. a. b. 470 c. 25. 30 26. 14 27. 90 28. 29. 30. 31. 32.
25 25 145 145 36 75 48 5 5
3 27 9 12 98 9 28 10 2 2 3
33. 34. 35. 36. 37. 38. 39. - 40. 41. - 42. - 43. 24 lots 44. ft
5 20 35 35 5 250 45 11 3 45 4
Section 3.5
37 95 394
Calculator Explorations 1. 3. 5.
80 72 323
4 15 19
Vocabulary and Readiness Check 1. equivalent; least common denominator 3. ; ; 5. expression 7. 6 9. 12 11. 56 13. 12
24 24 24
5 1 4 3 3 19 11 12 89 1 13 8 3 1 11
Exercise Set 3.5 1. 3. 5. - 7. - 9. 11. 13. 15. 17. 19. 21. 23. - 25. 27. 29. -
6 6 33 14 5 12 36 7 99 2 27 33 14 35 36
1 33 17 8 11 53 11 98 11 19 56 5 9
31. 33. 35. 37. 39. - 41. - 43. 45. 47. - 49. 51. 53. - 55. - 57. 6 59. 7
20 56 16 9 30 42 18 143 60 20 45 24 1000
13 1 11 34 17 1 3 7 5 49 47
61. 7 63. 65. 67. 69. cm 71. m 73. x + 75. - - x 77. mph 79. in. 81. of students 83. in.
12 4 6 15 10 2 8 100 8 100 32
19 1 79 3 4 7 223 49
85. 87. 89. 91. 20 93. -6 95. + = 97. 99. 101. answers may vary 103. standard mail
25 25 100 5 5 5 540 44
Section 3.6
Vocabulary and Readiness Check 1. complex 3. division 5. addition
1 7 1 23 2 17 5 35 17 11 29 27 1 9 7
Exercise Set 3.6 1. 3. 5. 7. 9. 11. 13. 15. 17. - 19. 21. 23. 25. 27. 29.
6 3 6 22 13 60 8 9 45 8 10 32 100 64 6
2 2 11 5 7 9 13 9 5 2 11 7 18 53 83
31. - 33. - 35. 37. 39. 41. 43. - 45. 47. - 49. 1 51. - 53. - 55. 57. 59. 61.
5 9 9 2 2 20 2 25 32 5 40 3 5 8 7
187 500 2 5 2 7 65 7 1 49 1
63. 65. 67. 3 69. 4 71. 3 73. 15 75. 1 77. 6 79. or 3 81. or 8 83. answers may vary
20 3 5 8 15 175 112 2 2 6 6
5 11
85. no; answers may vary 87. 89. 91. halfway between a and b 93. false 95. true 97. true 99. addition; answers may vary
8 56
77 55
101. subtraction, multiplication, addition, division 103. division, multiplication, subtraction, addition 105. - 107. -
16 16
Section 3.7
280 3776 1 3
Calculator Explorations 1. 3. 5. 26 7. 92
11 35 14 10
Vocabulary and Readiness Check 1. mixed number 3. round
8 3 7
Exercise Set 3.7 1. 2 2 1 7 3. 3 4 1 1 1 5. b 7. a 9. 11. 4 13. 7 ; 8
3 3 8 5 3 3 21 8 10
5 4 3 2 1 0 1 2 3 4 5 4 3 2 1 0 1 2 3 4
31 1 1 2 2 11 7 53 5 13 3
15. 23 ; 24 17. 12 19. 5 21. 18 23. a 25. b 27. 6 ; 7 29. 13 ; 14 31. 17 33. 47 35. 25 37. 13 39. 2 ; 3
35 2 2 3 3 14 25 84 14 24 5
5 24 5 3 11 2 25 13 1 7 11 4 16
41. 7 ; 7 43. 45. 3 47. 15 49. 4 51. 5 53. 6 55. 57. 35 59. 2 61. 73 63. 65. 5 67. 13
14 25 9 4 14 9 33 18 2 30 14 7 33
