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1. |
Use the graph to determine the solution of -x2 + 6x - 9 = 0. |
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A. |
4 |
B. |
2 |
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C. |
-9 |
D. |
3 |
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Hint |
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2. |
Solve the equation w2 - 4w = 12 by graphing. |
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A. |
0, -3 |
B. |
6 |
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C. |
-2, 6 |
D. |
1, 4 |
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Hint |
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3. |
Solve x2 - 6x = 0 by graphing or by factoring. |
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A. |
0 |
B. |
-6 |
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C. |
-6, 0 |
D. |
0, 6 |
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Hint |
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4. |
Solve the equation a2 + 4a = -3 by graphing or by factoring. |
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A. |
1, 3 |
B. |
-3, 1 |
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C. |
-1, 3 |
D. |
-3, -1 |
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Hint |
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5. |
Which value of c makes the trinomial x2 + 16x + c a perfect square? |
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A. |
128 |
B. |
64 |
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C. |
32 |
D. |
256 |
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Hint |
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6. |
Solve x2 + 3x - 10 = 0 by completing the square. |
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A. |
2, 5 |
B. |
5 |
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C. |
-5, 2 |
D. |
2 |
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Hint |
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7. |
Solve x2 + 7x + 8 = 0. |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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8. |
Solve x2 - 6x + 25 = 0. |
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A. |
6 ± 8i |
B. |
 |
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C. |
-3 ± 4i |
D. |
3 ± 4i |
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Hint |
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9. |
Find a quadratic equation that has roots 6 + 2i and 6 - 2i. |
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A. |
x2 +12x - 40 = 0 |
B. |
x2 + 12x + 40 = 0 |
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C. |
x2 - 12x - 40 = 0 |
D. |
x2 - 12x + 40 = 0 |
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Hint |
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10. |
Solve 3x2 - 10x - 8 = 0. |
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A. |
 , 2 |
B. |
 , 3 |
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C. |
-4,  |
D. |
-, 4 |
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Hint |
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11. |
Find the axis of symmetry of the graph of f(x) = 4x2 -4x + 4. |
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A. |
x =  |
B. |
x = 2 |
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C. |
y = 3 |
D. |
x = 4 |
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Hint |
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12. |
Choose the equation of the parabola that passes through the points at
(-2, 3), (0, 7), and (1, 15). |
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A. |
y = 3x2 - x + 7 |
B. |
y = -x2 - 5x + 2 |
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C. |
y = 2x2 + 6x + 7 |
D. |
y = x2 + 3x + 7 |
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Hint |
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13. |
Which is the graph of the inequality y < x2 -2x - 8? |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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14. |
Solve 9t2 - 15t + 4  0. |
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A. |
 |
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B. |
 |
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C. |
 |
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D. |
 |
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Hint |
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15. |
Find the mean of the set {14, 16, 23, 9, 13, 31, 12, 28}. |
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A. |
19 |
B. |
16.5 |
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C. |
18.25 |
D. |
15 |
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Hint |
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16. |
Find the standard deviation of the set {4, 7, 3, 8, 2, 6, 5, 8, 3, 2} to the nearest hundredth. |
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A. |
2.46 |
B. |
2.35 |
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C. |
2.23 |
D. |
2.00 |
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Hint |
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17. |
The KlipKlamp company manufactures paper clips with masses that are normally distributed with a mean of 2.5 grams and a standard deviation of 0.125 gram. What percent of the clips are more than 2.75 grams? |
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A. |
16% |
B. |
2.5% |
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C. |
0.5% |
D. |
5% |
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Hint |
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18. |
The scores on a national achievement test are normally distributed with a mean of 50 and a standard deviation of 10. Out of a group of 200 students, how many would you expect to score more than 70? |
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A. |
5 |
B. |
32 |
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C. |
1 |
D. |
10 |
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Hint |
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