Basic Mathematics for College Students

17.

19. a.(8) b. c. 8  8 d.


20. a.greater, equal b.less, equal


21. 
    

25.

27.

29.

31. 33. 35. 37. 39.true 41.true

43.false 45.false 47. 9 49. 8 51. 14 53. 180

55. 11 57. 4 59. 102 61. 561 63. 20 65. 6
    67. 253 69. 0 71. 73. 75. 77.
    79.52,22,12, 12, 52, 82 81.3,5, 7
    83.31 lengths 85.0, 20, 5,40, 120 87.peaks: 2, 4, 0;
    valleys:3,5, 2 89. a.1 (1 below par)
    b.3 (3 below par) c.Most of the scores are below par.


56. a.20° to 10° b.40° c.10° 93. a.200 yr
    b.A.D. c.B.C. d.the birth of Christ


57. 
    

105.23,500 107. 761

109.associative property of multiplication

decrease expenses, increase income, decrease expenses,

increase income, increase income, increase income, decrease

expenses, decrease expenses, increase income, decrease

expenses

1.like 3.identity 5.Commutative

7. a. b. 12 c. 2 9.subtract,
   larger 11. a.yes b.yes c.no d.no 13. a. 0 b. 0
   15.18, 19 17.5, 2 19. 9 21. 10 23. 62
   25. 96 27. 379 29. 874 31. 3 33. 1
   35. 22 37. 48 39. 357 41. 60 43. 7 45. 4

0100     10, 0  120    12

Study Set Section 2.2 (page 152)

Think It Through (page 148)

15 °

10 °

5 °

− 5 °

− 10 °

− 15 °

0 °

Mon.

Temperature

(Fahrenheit)

Tue. Wed.

Line graph

Thu. Fri.

− 5 − 4 − 3 − 2 − 1012345

− 5 − 4 − 3 − 2 − 1012345

− 5 − 4 − 3 − 2 − 1012345

− 5 − 4 − 3 − 2 − 1012345

0  80  0  80

47. 10 49. 41 51. 3 53. 6 55. 3 57. 7

59. 9 61. 562 63. 2 65. 0 67. 0 69. 2 71. 1
    73. 3 75.1,032 77. 21 79.8,348 81. 20
    83.112°F, 114°F 85. a.15,720 ft b.12,500 ft


60. a.9 ft b.2 ft above flood stage 89.195°
    91.5, 4% risk 93.3,250 m 95.($967) 103. a.16 ft
    b.15 ft^2 105. 2  53

1.opposite, additive 3.value 5.opposite 7. 3

9.change 11. a. 3 b. 12 13.,6,9

15. a. 8 (4) b. 4 (8) 17.3, 2, 0
    19.2,10, 6, 4 21. 7 23. 10 25. 9 27. 18
    29. 18 31. 50 33. a. 10 b. 10 35. a. 25 b. 25
    37. 15 39. 9 41. 2 43. 10 45. 9 47. 12
    49. 8 51. 0 53. 32 55. 26 57.2,447 59.43,900


16. 3 63. 10 65. 8 67. 5 69. 3 71. 1 73. 9
    75. 22 77. 9 79. 4 81. 0 83. 18 85. 8
    87. 25 89.2,200 ft 91.1,066 ft 93. 8
    95.4 yd 97.$140 99.Portland, Barrow, Kansas City,
    Atlantic City, Norfolk 101.470°F 103.16-point increase


17. a.24,090 b.6,000 111. 156

1.factor, factor, product 3.unlike 5.Associative

7.positive, negative 9.negative 11.unlike/different

13. 0 15. a. 3 b. 12 17. a.base: 8, exponent: 4
    b.base:7, exponent: 9 19.6, 24 21. 15 23. 18
    25. 72 27. 126 29.1,665 31.94,000 33. 56


14. 7 37. 156 39. 276 41.1,947 43.72,000,000


15. 90 47. 150 49. 384 51. 336 53. 48 55. 81


16. 36 59. 144 61. 27 63. 32 65. 625 67. 1
    69.49, 49 71.144, 144 73. 60 75. 0 77. 64
    79. 20 81. 18 83. 60 85. 48 87.8,400,000
    89. 625 91. 144 93. 1 95. 120 97.2,000 ft


17. a.high: 2, low: 3 b.high: 4, low: 6


18. a.402,000 jobs b.423,000 jobs c.581,000 jobs
    d.528,000 jobs 103.324°F 105.$1,200
    107.18 ft 109.$215,718 115.2, 3, 5, 7, 11, 13,
    17, 19, 23, 29 117.43 R 3

1.dividend, divisor, quotient; dividend, divisor, quotient

3.by, of 5. a.5(5)      25 b.6(6)     36

c.0(15)    0 7. a.positive b.negative 9. a. 0

b.undefined 11. a.always true b.sometimes true

c.always true 13. 7 15. 4 17. 6 19. 8

21. 22 23. 39 25. 30 27. 50 29. 2 31. 5

33. 9 35. 4 37. 16 39. 21 41. 40 43. 500


34. a.undefined b. 0 47. a. 0 b.undefined 49. 3
    51. 17 53. 0 55. 5 57. 5 59.undefined
    61. 19 63. 1 65. 20 67. 1 69. 10 71. 24
    73. 30 75. 4 77. 542 79.1,634 81.$35 per
    week 83.1,010 ft 85.7° per min 87.6 (6 games
    behind) 89.$15 91.$17 99. 211 101.associative
    property of addition 103.no

Study Set Section 2.5 (page 180)

Study Set Section 2.4 (page 172)

Study Set Section 2.3 (page 162)

A-36 Appendix V Answers to Selected Exercises

Number Opposite Absolute value

 25 25 25

39  39 39

00 0