ANSWERS
| 1. |
2. | ||
| 3. |
4. | ||
| 5. a.) |
6. | ||
| 7. |
8. | ||
| 9. |
10. | ||
| 11. |
12. w = | ||
| 13. |
14. ![]() | ||
| 15. |
16. ![]() | ||
| 17. (3, ) | 18. | ||
| 19. (-, 1) (4, ) | 20. (-4, -7/3) [2, 5] | ||
| 21. (-, -1.11] [.35, 3.43] |
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| 23. (x + 2)2 + (y - 5)2 = 13 | 24. center (7, -2); radius =
| ||
| 25. Graph has y-axis symmetry | 26. Graph has x-axis symmetry | ||
| 27. -1/5; -a2 - 4a | 28. a) (-1.5,-2) b) (-1.5, -.5) and (1.5, 1.8) Must have an answer from each interval for part b to be right. | ||
| 29. Yes |
30. Domain (-, -1) (-1, )
Range (-, -3] [0, ) | ||
| 31. [5/2, 7) (7, ) | 32. y = | ||
|
33. Window [-5,5] by [-2,10] |
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| 34. y = |
35. y = -4x + |
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| 36. Vertical stretch factor of 3 Horizontal shift 2 right Vertical shift 1 up ![]() |
37. a) y = Vertex b) Line of symmetry x = c) Range: d)Minimum | ||
| 38. f(x) = (x - 2)2 + 3 | 39. a) c) | ||
40. ![]() |
41. y = -2(x + 3)2 - 5 | ||
| 42. No | 43. Domain: [0,)
Range: [3, ) | ||
| 44. f -1(x) =
|
45. ![]() | ||
46. a)
b) Local Max. = (-.31, 4.82) Local Min. = (2.65, -21.19) c) Increasing (-, -.31) (2.65, ) Decreasing (-.31, 2.65) |
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| 47. Odd | 48. Quotient = 4x2 + 5x + 15 remainder = 47 | ||
| 49. f(-1) = 7 \ remainder = 7 | 50. Q(x) = x + 2; R(x) = 4x + 13 | ||
| 51. Yes | 52. k = - | ||
| 53. f(x) = a(x + 2)(x - 3)(x - 4 - i)(x - 4 + i) | 54. f(x) = 2(x - 2)(x - 3) = 2x2 - 10x + 12 | ||
| 55. -6 + 18i | 56. -1 - i | ||
| 57. {-7, 1, 2i} | 58. {-1.44, .41, 1.70} | ||
| 59. a) x = -4; x = -1
b) y = 0 c) Domain: |
60. | ||
| 61. See sketch at right
a) { - 4, - 1, 2 } b) y-int = c) V.A. x = - 2, x = 5 d) H. A. None e) y = x + 6 |
![]() 62. f(x) = | ||
| 63. [0, 6.54) | 64. 6.5 | ||
| 65. { 3 } | 66. ![]() Domain: [5, ∞), Range: [-4, ∞) | ||
| 67. Domain : all reals
Range (-2, ) H. A. y = -2 ![]() |
68. | ||
| 69. Max. ( - 1.00 , .62 )
Min. ( 1.11 , - .69 ) [ - 3 , 3 ] by [ - 1 , 1 ] ![]() |
70. a) b) { 4 } c) { 8 } | ||
| 71. Domain: (-1,)
Range: all reals V. A.: x = -1 ![]() |
72. | ||
| 73. a) 3 P = x b) log 3 R = Q | 74. log a + 2log b - | ||
75. ![]() |
76. | ||
| 77. a) -6.34; b) 13.22 | 78. 1.76 | ||
| 79. a) y = .709 x -18.22
b) 31.42 in c) .99; very good |
80. 2.5 inches | ||
| 81. a) 2.5 inches or 7.29 inches
b) 4.70 inches |
82. a) b) S = | ||
| 83. $200 or $175 | 84. 6.35 feet | ||
| 85. V < 31.23 ( 0 , 31.23) | 86. a) 109.77 feet b) 3.40 sec. | ||
| 87. 250 yd by 500 yd | 88. 13,500 | ||
| 89. 110.02 days | 90. 166 | ||
| 91.  8.19%; | 92. 5.22 years | ||
| 93. a) none
b) quadratic or exponential |
94. b) y = 124.27(1.09)x c) 287.2 million | ||
| 95. 14 min |