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1. |
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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2. |
Use the quadratic formula to solve 3y2 + 2 = 8y. Approximate the solutions to the nearest hundredth. |
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A. |
0.56, 4.77 |
B. |
0.43, 2.87 |
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C. |
0.28, 2.39 |
D. |
-0.64, 1.32 |
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Hint |
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3. |
Which is the graph of y = 2.5x? |
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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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4. |
Find the value of b that makes x2 + bx + 36 a perfect square. |
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A. |
6 |
B. |
12 |
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C. |
324 |
D. |
-12, 12 |
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Hint |
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5. |
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, –9), maximum |
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C. |
(1, 3), minimum |
D. |
(1, –1), maximum |
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Hint |
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6. |
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. |
6 and 9 |
D. |
7 and 5 |
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Hint |
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7. |
The sum of two numbers is 2, and the product is 3. What are the numbers? |
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A. |
no solution |
B. |
1 and –3 |
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C. |
1 and 1 |
D. |
–1 and 3 |
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Hint |
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8. |
Solve x2 – 12x + 34 = 0 by taking the square root of each side. |
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A. |
{6} |
B. |
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C. |
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D. |
{5, 7} |
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Hint |
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9. |
Which method of solving quadratic equations is best suited for the equation x2 – 18x = 0 |
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A. |
factoring |
B. |
quadratic formula |
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C. |
graphing |
D. |
completing the square |
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Hint |
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10. |
For equations of the form y = ax, where a is a constant, what is true about a if the y-values change little for small values of x, but increase quickly for large x values? |
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A. |
a = 1 |
B. |
–1 < a < 0 |
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C. |
a > 1 |
D. |
0 < a < 1 |
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Hint |
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11. |
Nancy invests $100 in one account for ten years at a 9% interest rate compounded annually, and she invests $150 in an account for 10 years at a 6% interest rate compounded semi-annually. How much money will she have in the accounts after 10 years? |
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A. |
$505.36 |
B. |
$270.92 |
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C. |
$507.65 |
D. |
$236.74 |
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Hint |
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12. |
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. |
$741.02 |
B. |
$713.82 |
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C. |
$1,741.02 |
D. |
$1,713.82 |
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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 = 3 |
B. |
geometric, r = 4 |
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C. |
geometric, r = 9 |
D. |
not geometric |
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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. |
exponential |
B. |
dependent |
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C. |
recursive |
D. |
geometric |
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Hint |
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