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1. |
Find the coordinates of the vertex of the graph of the equation
y = -3x2 - 12x - 5. |
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A. |
(-4, -5) |
B. |
(1, -20) |
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C. |
(2, -41) |
D. |
(-2, 7) |
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Hint |
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2. |
What is the equation of the graph shown? |
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A. |
y = -x2 +2x - 1 |
B. |
y = x2 + 2x + 1 |
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C. |
y = -x2 - 2x - 1 |
D. |
y = x2 - 2x + 1 |
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Hint |
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3. |
Solve x2 – 6x + 5 = 0 by graphing. |
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A. |
5 |
B. |
1, 5 |
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C. |
1 |
D. |
-1 |
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Hint |
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4. |
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 0 and 1 |
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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 -1 and 0 |
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Hint |
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5. |
Use the quadratic formula to solve x2 + 2x - 8 = 0. |
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A. |
-4, -2 |
B. |
-2 |
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C. |
-4, 2 |
D. |
-4 |
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Hint |
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6. |
Solve 0.25x2 – 7x – 15 = 0. |
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A. |
{3, 15} |
B. |
{–5, 3} |
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C. |
{–2, 30} |
D. |
{4, 30} |
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Hint |
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7. |
Solve x2 – 16x – 17 = 0 by completing the square. |
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A. |
{–1, 17} |
B. |
{1, 13} |
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C. |
{1, 17} |
D. |
{–1, 13} |
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Hint |
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8. |
Which of the following equations will have exactly 1 real root? |
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A. |
9x2 + 12x – 4 |
B. |
x2 – 6x – 9 |
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C. |
4x2 – 8x + 4 |
D. |
2x2 + 5x – 16 |
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Hint |
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9. |
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 = 20(0.53)d, where y is the number of phone calls after d days. On what day should she expect to have 3 calls? |
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A. |
15 |
B. |
3 |
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C. |
2 |
D. |
10 |
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Hint |
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10. |
Use a graph to approximate 31.2. |
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A. |
5.4 |
B. |
3.12 |
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C. |
3.7 |
D. |
0.27 |
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Hint |
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11. |
Ricky invested $1000 in an account at 8% interest compounded quarterly. How much money will he have earned on the account after 7 years? |
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A. |
$1,713.82 |
B. |
$1,741.02 |
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C. |
$713.82 |
D. |
$741.02 |
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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. |
$161.06 |
B. |
$9,287.60 |
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C. |
near $0 |
D. |
$1,200 |
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Hint |
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13. |
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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14. |
What is the eighth term of the geometric sequence whose first three terms are 3, 6, and 12? |
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A. |
384 |
B. |
256 |
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C. |
768 |
D. |
128 |
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Hint |
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