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1. |
Which is the graph of the equation y = 2x2 - 1? |
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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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2. |
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 -3 and -2 and between 0 and 1 |
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D. |
between 0 and 1 and between 2 and 3 |
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Hint |
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3. |
Use the quadratic formula to solve 6x2 - x - 1 = 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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4. |
The Mendoza family just bought a house for $180,000. If the value of the house increases at a rate of 3% per year, about how much will it be worth in 10 years? |
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A. |
$242,000 |
B. |
$258,000 |
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C. |
$250,000 |
D. |
$234,000 |
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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. |
$1127.27 |
B. |
$1120.00 |
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C. |
$1010.03 |
D. |
$1124.86 |
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Hint |
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6. |
Solve 2z2 + z - 4 = 0 by completing the square. |
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A. |
-2, 1 |
B. |
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C. |
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D. |
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Hint |
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7. |
Find the vertex of y = –2x2 + 4x – 3, and tell whether it is a maximum or minimum. |
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A. |
(–1, 1), maximum |
B. |
(1, –1), maximum |
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C. |
(–1, –9), maximum |
D. |
(1, 3), minimum |
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Hint |
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8. |
The sum of two numbers is 12, and the product of the numbers is 36. What are the numbers? |
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A. |
6 and 6 |
B. |
9 and 4 |
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C. |
7 and 5 |
D. |
6 and 9 |
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Hint |
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9. |
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, 13} |
D. |
{1, 17} |
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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. |
quadratic formula |
B. |
graphing |
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C. |
completing the square |
D. |
factoring |
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Hint |
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11. |
Given the coordinates (0, 3), (1, 11), (2, 19), (3, 27), would a graph of these points exhibit exponential behavior? |
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A. |
no, it would not display exponential or linear behavior |
B. |
yes, exponential behavior only |
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C. |
yes, exponential and linear behavior |
D. |
no, it would display linear behavior |
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Hint |
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12. |
Use a graph to approximate 31.2. |
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A. |
3.12 |
B. |
0.27 |
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C. |
3.7 |
D. |
5.4 |
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Hint |
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13. |
Determine whether the sequence 3, 12, 48, 192 is geometric. If so, find its common ratio. |
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A. |
geometric, r = 4 |
B. |
geometric, r = 3 |
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C. |
geometric, r = 9 |
D. |
not geometric |
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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. |
25.6, 20.48 |
B. |
26, 22 |
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C. |
24, 16 |
D. |
28.5, 25.52 |
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Hint |
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