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1. |
What is the equation of the graph shown? |
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A. |
f(x) = 2x2 + 2x + 1 |
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B. |
f(x) = -2x2 + 2x - 1 |
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C. |
f(x) = -2x2 + 2x + 1 |
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D. |
f(x) = 2x2 - 2x + 1 |
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Hint |
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2. |
What are the real roots of the quadratic equation whose related function is graphed below? |
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A. |
-1, -3 |
B. |
3, -1 |
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C. |
3 |
D. |
-3, 1 |
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Hint |
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3. |
The equation x2 + 1 = -3x does not have integral roots. State the consecutive integers between which the roots lie. |
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A. |
between -3 and -2 and between -1 and 0 |
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B. |
between -1 and 0 and between 0 and 1 |
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C. |
between 0 and 1 and between 2 and 3 |
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D. |
between -3 and -2 and between 0 and 1 |
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Hint |
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4. |
Use the quadratic formula to solve x2 + 2x - 8 = 0. |
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A. |
-2 |
B. |
-4, -2 |
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C. |
-4, 2 |
D. |
-4 |
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Hint |
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5. |
Use the quadratic formula to solve 6x2 - x - 1 = 0. |
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A. |
 |
B. |
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C. |
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D. |
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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. |
$4011.62 |
B. |
$4279.35 |
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C. |
$3868.90 |
D. |
$6381.41 |
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Hint |
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7. |
Find the value of c that makes x2 + 16x + c a perfect square. |
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A. |
8 |
B. |
64 |
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C. |
-64 |
D. |
16 |
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Hint |
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8. |
Solve a2 - a - 20 = 0 by completing the square. |
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A. |
-4, 5 |
B. |
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C. |
-5, 4 |
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. |
2 |
B. |
cannot be determined from given information |
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C. |
-2 |
D. |
4 |
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Hint |
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10. |
Use a graph in order to approximate  . |
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A. |
133.4 |
B. |
112.6 |
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C. |
0.0045 |
D. |
0.0089 |
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Hint |
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11. |
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. |
2 |
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C. |
23 |
D. |
28 |
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Hint |
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12. |
Each year, new computers are built with better technology, making older ones less valuable. If the computers looses value at a rate of 20% per year, how much will a $1500 computer be worth in ten years? |
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A. |
$9,287.60 |
B. |
$1,200 |
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C. |
near $0 |
D. |
$161.06 |
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Hint |
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13. |
Determine whether the sequence 7, 21, 35, 49 is geometric. If so, find its common ratio. |
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A. |
geometric, r = 14 |
B. |
not geometric |
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C. |
geometric, r = 3 |
D. |
geometric, r = 7 |
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Hint |
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14. |
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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