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1. |
Find the equation of the axis of symmetry of the graph of
y = 2x2 - 8x + 5. |
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A. |
x = 2 |
B. |
x = 4 |
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C. |
x = -2 |
D. |
x = -4 |
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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 -1 and 0 and between 0 and 1 |
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B. |
between -3 and -2 and between 0 and 1 |
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C. |
between -3 and -2 and between -1 and 0 |
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D. |
between 0 and 1 and between 2 and 3 |
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Hint |
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3. |
Lance is planning to invest $5000 for a period of 3 years. He has a choice of four different investments. Which of the combinations of interest rates and compounding below will earn the most money? |
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A. |
7%, daily |
B. |
7.125%, quarterly |
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C. |
7.1%, monthly |
D. |
7.2%, annually |
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Hint |
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4. |
Solve a2 - a - 20 = 0 by completing the square. |
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A. |
 |
B. |
-5, 4 |
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C. |
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D. |
-4, 5 |
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Hint |
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5. |
The property of a parabola that allows it to be folded in half so that each half matches the other exactly is called what? |
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A. |
symmetry |
B. |
vertex |
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C. |
maximum |
D. |
minimum |
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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. |
7 and 5 |
B. |
6 and 9 |
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C. |
9 and 4 |
D. |
6 and 6 |
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Hint |
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7. |
Solve 0.25x2 – 7x – 15 = 0. |
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A. |
{3, 15} |
B. |
{–5, 3} |
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C. |
{4, 30} |
D. |
{–2, 30} |
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Hint |
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8. |
Which method of solving quadratic equations is best suited for the equation x2 – 18x = 0 |
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A. |
factoring |
B. |
graphing |
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C. |
quadratic formula |
D. |
completing the square |
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Hint |
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9. |
How many real roots are there for the equation 2x2 + 6x + 3? |
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A. |
1 |
B. |
2 |
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C. |
0 |
D. |
cannot be determined from given information |
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Hint |
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10. |
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. |
10 |
B. |
3 |
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C. |
2 |
D. |
15 |
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Hint |
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11. |
Use a graph to approximate 31.2. |
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A. |
0.27 |
B. |
3.7 |
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C. |
5.4 |
D. |
3.12 |
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Hint |
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12. |
Suppose inflation of money is at a rate of 3% per year in the United States. How much will a $1 candy bar cost in 30 years? |
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A. |
$1.90 |
B. |
$2.43 |
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C. |
$4.32 |
D. |
$0.40 |
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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 = 3 |
B. |
geometric, r = 14 |
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C. |
geometric, r = 7 |
D. |
not geometric |
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Hint |
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14. |
Suppose that the geometric mean of two numbers is 48, and the first number is 12. What is the second number? |
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A. |
24 |
B. |
84 |
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C. |
192 |
D. |
96 |
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Hint |
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