CHAPTERS Cumulative Test 7–12 For use after …. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. Cumulative Test continued For use after Chapters 7212 In Exercises 21 and 22, use
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Cumulative Test continuedFor use after Chapters 7212
CHAPTERS
7–12
In Exercises 38 and 39, use the following information.
A pizza box has a length of (x 1 11) inches, a width of (x 1 12) inches, and a height of (x 2 2) inches.
38. Write a polynomial that represents the volume of the pizza box.
39. The volume of the pizza box is 480 cubic inches. What are the length, width, and height of the pizza box?
Graph the function. Label the vertex and axis of symmetry.
40. y 5 x2 2 5 41. y 5 2x2 2 8x 1 3
x
y1
12121
23
25
23 3
x
y1
12121
23
25
3 5
42. Graph y 5 2(x 2 4)(x 1 2)
Solve the equation. Round the solutions to the nearest hundredth, if necessary.
43. x2 2 225 5 0 44. 81x2 2 18 5 7
Use the quadratic formula to solve the equation. Round the solutions to the nearest hundredth, if necessary.
45. 9x2 2 11x 1 3 5 0 46. 7x2 5 2x 2 5
Tell whether the equation has two solutions, one solution, or no solution.
47. 24x2 1 12x 2 9 5 0 48. 2w2 1 9w 5 2w 2 4
49. The distance d (in feet) that it takes a roller coaster train to come to a complete stop can be modeled by the equation d 5 0.7s2 1 0.5s where s is the speed of the train (in feet per second). If the train has 30 feet to come to a complete stop, fi nd the speed at which the train should be traveling. Round your answer to the nearest tenth of a foot per second.
Cumulative Test continuedFor use after Chapters 7212
Graph the function. Identify its domain and range.
50. y 5 Ï}
x 2 5 51. y 5 1 }
3 Ï}
x 1 2
x
y
2
6
22222
26
6 10
x
y
1
3
1212321
23
3
Simplify the expression.
52. Î}
108
} 4x2 53. Ï
}
18x p 2 Ï}
x3 54. 3 Ï}
375 2 3 Ï}
3000
55. A 12-foot long sliding board is attached to an 8-foot high platform. How far is the bottom of the sliding board from the base of the platform? Round your answer to the nearest tenth of a foot.
56. A treasure hunt is mapped out on a coordinate grid. The fi rst clue is located at (2, 5). The second clue is located at (23, 7). What is the distance between clues if the distance between grid lines represents 25 feet? Round your answer to the nearest tenth of a foot.
Given that y varies inversely with x, use the specifi ed values to write an inverse variation equation that relates x and y. Then fi nd y when x 5 6.
e. x > 0; C > 4.75 f. The average cost per person decreases toward 4.75 as the number of people increases. The decreases are rapid at fi rst, but become more gradual. g. No, the average cost per person cannot go below $4.75. This value is a horizontal asymptote for the function. Because the extra items cost $4.75 per person and a portion of the pavilion cost will be added to this amount, the average cost per person will never drop below this amount.
Chapters 7–12
Cumulative Test
1. (23, 22) 2. (2, 3) 3. (21, 8) 4. (4, 1)
5. no solution 6. infi nitely many solutions
7.
x
y
26
626
6
8. (22)8 9. 615 10. 44 11. 58 12. 16m4n2
13. 227
} r3 14.
4z6 }
x4y2 15. 3b
} 4ac2 16.
4m10 }
9
17. 7776 18. 1 }
4 19. 3.84 3 1023
20. 0.0000526 21. p 5 24,000(1.02)t
22. $27,027.90
23. geometric;
24. 4x3 1 7x2 2 8x 1 3 25. 6y2 2 4y 2 3
26. 7t3 2 33t2 2 31t 2 6 27. 9a2 2 30ab 1 25b2
28. (x 1 3)(x 1 7) 29. (4y 2 1)( y 1 6)
30. (x 1 11)(x 2 11) 31. (t 1 3)(t 2 3)(t 1 2)
32. 28, 7 33. 13 34. 1 }
11 , 22 35. 26, 0, 6
36. h 5 216t2 1 18t 37. t 5 1.125
38. x3 1 21x2 1 86x 2 264
39. l 5 15 in., w 5 16 in., h 5 2 in.
40.
x
y1
12121
23
23 3
(0, 25)
x 5 0 41.
x
y1
12121
23
25
3 5
(2, 25)
x 5 2
42.
43. 615 44. 6 5 } 9 45. 0.81, 0.41
46. no solution 47. one solution
48. two solutions 49. 6.2 ft/sec
50.
x
y
2
6
22222
26
6 10
51.
x
y
1
3
1212321
23
3
domain: x ≥ 5; domain: x ≥ 22;range: y ≥ 0 range: y ≥ 0
52. 3 Ï
}
3 }
x 53. 6x2 Ï
}
2 54. 25 3 Ï}
3 55. 8.9 ft
56. 134.6 ft 57. y 5 12
} x ; 2 58. y 5 224
} x ; 24
59. x 1 5 1 3 }
x 2 3 60. 2x2 2 3x 1 1 1
2 }
3x 1 2
61. x 1 3 }}
(x 1 2)(x 2 5) 62.
(x 2 2)(x2 2 4) }}
(x 1 6)x2
63. 22x2 1 7x 1 35
}} (x 2 1)(x 1 7)
64. 3x2 1 13x 2 21
}} (x 1 6)(x 2 2)(x 2 3)
65. 5x
} 96
66. x 1 1
} 2
Chapters 1–12
End-of-Course Test
1. 21 2. 2 3. 51 4. 211 5. $2.50, $2.75, 18-holes 6. y 5 2x 1 26; independent variable: x, dependent variable: y, domain: x ≥ 0, range: y ≥ 26 7. 225 8. 42 9. 235 10. 0.16