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1. |
Express 0.0000421 in scientific notation. |
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A. |
4.21 × 10-4 |
B. |
4.21 × 10-5 |
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C. |
4.21 × 10-6 |
D. |
4.21 × 10-9 |
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Hint |
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2. |
Which equation is the slope-intercept form of the equation of the line that passes through (1, 2) and is parallel to 4x - 2y = 6? |
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A. |
 |
B. |
y = 2x |
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C. |
y = -2x + 1 |
D. |
y = 4x + 3 |
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Hint |
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3. |
Simplify  Assume the denominator is not equal to zero. |
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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. |
Evaluate (3.2 × 10-5)(5.4 × 109). Express the result in scientific notation. |
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A. |
1.728 × 103 |
B. |
17.28 × 104 |
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C. |
1.728 × 105 |
D. |
0.1728 × 106 |
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Hint |
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5. |
Find  . |
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A. |
-15 |
B. |
-14 |
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C. |
14 |
D. |
15 |
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Hint |
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6. |
Find  |
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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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7. |
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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8. |
Find the situation that involves a decreasing linear relationship and has direct variation. |
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A. |
The temperature that begins at 0°F at 6:00 a.m. rises 3°F every hour for 6 hours. |
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B. |
An airplane that begins at 20,000 feet and descends for a landing on the ground at the airport. |
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C. |
A bucket that begins at ground level and is lowered into a well at a rate of 1 foot per second. |
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D. |
A submarine that begins at the bottom of the ocean and is raised to the surface of the water at 15 meters per second. |
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Hint |
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9. |
What is the equation of a line that has a slope of 4 and passes through (6, 3)? |
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A. |
y = 4x – 27 |
B. |
y = 4x – 3 |
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C. |
y = 4x – 7 |
D. |
y = 4x – 21 |
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Hint |
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10. |
Which line is parallel to the line listed below?
 |
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A. |
 |
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B. |
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C. |
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D. |
y = 2x - 5 |
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Hint |
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11. |
Write the equation in slope-intercept form.
–6x = –10 – 2y |
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A. |
y = 3x – 5 |
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B. |
y = 3x + 8 |
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C. |
–6x + 2y + 10 = 0 |
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D. |
y + 8 = 3(x + 1) |
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Hint |
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12. |
What is the lowest point on the graph of y = x2 + 2? |
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A. |
(2, 0) |
B. |
(0, 2) |
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C. |
(0, –2) |
D. |
(0, 0) |
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Hint |
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13. |
What is the reciprocal of  ? |
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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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14. |
What is the reciprocal of –20? Evaluate it in decimal form. |
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A. |
–0.20 |
B. |
–0.05 |
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C. |
–0.02 |
D. |
–0.50 |
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Hint |
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15. |
What is the relationship between constant second differences and the coefficient of the equation? |
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A. |
the second difference is 2 times the coefficient |
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B. |
the second difference is the same as the coefficient |
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C. |
the second difference is –2 times the coefficient |
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D. |
the second difference is opposite the coefficient |
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Hint |
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16. |
Consider the following conjecture. If an even number is written 2k, where k is a whole number, then 2k + 1 must be an odd number. What can be your next course of action in dealing with this conjecture? |
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A. |
develop an argument to prove the conjecture |
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B. |
all answers are correct |
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C. |
test every possible case to prove the conjecture |
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D. |
find a counterexample to disprove the conjecture |
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Hint |
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17. |
Tell whether the statement is sometimes true, always true, or never true for positive values of n. If it is sometimes true, state for what value it is true.
4n = 6,561. |
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A. |
sometimes true, n = 8 |
B. |
never true |
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C. |
always true |
D. |
sometimes true, n = 7 |
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Hint |
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18. |
Which curve represents exponential decay? |
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 |
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A. |
curve a |
B. |
curve c |
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C. |
curve b |
D. |
curve d |
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Hint |
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19. |
Evaluate.  |
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A. |
6 |
B. |
8 |
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C. |
5 |
D. |
–6 |
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Hint |
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20. |
Evaluate. |
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A. |
–2 |
B. |
–3 |
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C. |
2 |
D. |
3 |
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Hint |
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