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1. |
Find the coordinates of the vertex of the graph of the equation
y = x2 - 5x + 7. |
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A. |
(5, 7) |
B. |
 |
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C. |
 |
D. |
(0, 7) |
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Hint |
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2. |
Solve x2 + 4x + 4 = 0 by graphing. |
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A. |
-2, 2 |
B. |
-4, 4 |
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C. |
-2 |
D. |
4 |
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Hint |
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3. |
Solve a2 + 16 = 0 by graphing. |
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A. |
-4 |
B. |
-4, 4 |
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C. |
4 |
D. |
 |
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Hint |
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4. |
Which is the graph of y = 2.5x? |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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5. |
Twyla puts $1000 in a savings account that pays 4% interest, compounded monthly. How much money will be in the account 3 years later if she makes no more deposits? |
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A. |
$1124.86 |
B. |
$1127.27 |
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C. |
$1010.03 |
D. |
$1120.00 |
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Hint |
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6. |
If a $5000 piece of equipment looses value at a rate of 5% per year, how much will it be worth after 5 years? |
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A. |
$4279.35 |
B. |
$4011.62 |
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C. |
$6381.41 |
D. |
$3868.90 |
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Hint |
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7. |
Find the value of b that makes x2 + bx + 36 a perfect square. |
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A. |
6 |
B. |
324 |
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C. |
12 |
D. |
-12, 12 |
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Hint |
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8. |
Solve 2z2 + z - 4 = 0 by completing the square. |
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A. |
 |
B. |
 |
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C. |
-2, 1 |
D. |
 |
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Hint |
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9. |
Suppose the equation of the axis of symmetry is x = 2. What is the y-coordinate of the vertex? |
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A. |
cannot be determined from given information |
B. |
-2 |
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C. |
4 |
D. |
2 |
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Hint |
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10. |
Which method of solving quadratic equations should be used when only an estimated solution is necessary? |
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A. |
completing the square |
B. |
factoring |
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C. |
graphing |
D. |
quadratic formula |
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Hint |
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11. |
How many real roots exist if the discriminant of the equation = 0? |
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A. |
1 |
B. |
0 |
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C. |
2 |
D. |
cannot be determined from given information |
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Hint |
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12. |
A guest on a talk show tends to receive many phone calls right after she is on the show, and then the calls become less frequent. This can be represented by the equation y = 30(0.92)d, where y is the number of phone calls after d days. How many phone calls should she expect after a week? |
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A. |
17 |
B. |
28 |
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C. |
23 |
D. |
2 |
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Hint |
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13. |
Find the next two terms of the geometric sequence 50, 40, 32, … |
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A. |
26, 22 |
B. |
24, 16 |
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C. |
28.5, 25.52 |
D. |
25.6, 20.48 |
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Hint |
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14. |
A formula in which the nth term of a sequence is expressed in terms of the previous term, as in  is called what? |
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A. |
geometric |
B. |
dependent |
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C. |
exponential |
D. |
recursive |
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Hint |
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