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1. |
The values in the graph below are _______ |
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A. |
integers. |
B. |
rational numbers. |
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C. |
natural numbers. |
D. |
irrational numbers. |
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Hint |
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2. |
Find the slope-intercept form of an equation of the line that has a slope of  and passes through (8,2). |
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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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3. |
A best-fit line drawn on a scatter plot ________ |
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A. |
always has a positive slope. |
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B. |
is a line that goes through every data point. |
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C. |
must be drawn through the first and last data points. |
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D. |
approximates the linear relationship of data points. |
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Hint |
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4. |
Choose the graph of f(x) = |x| - 2. |
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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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5. |
Use the substitution method to solve m - n = 7 and 3m + 2n = 6. |
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A. |
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B. |
(-3, -10) |
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C. |
(4, -3) |
D. |
(-5, 2) |
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Hint |
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6. |
Solve  . |
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A. |
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B. |
(-2, -8) |
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C. |
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D. |
(2, 8) |
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Hint |
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7. |
Write a matrix for the system of equations. 
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A. |
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B. |
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D. |
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Hint |
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8. |
Simplify  |
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A. |
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B. |
k3 |
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C. |
k-3 |
D. |
k17 |
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Hint |
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9. |
Simplify (-3a5b3)4. |
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A. |
-81a9b12 |
B. |
-12a9b7 |
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C. |
-12a20b12 |
D. |
81a20b12 |
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Hint |
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10. |
Solve the equation n2 +3n = 0 by graphing. |
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A. |
0 |
B. |
0, -3 |
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C. |
3 |
D. |
0, 3 |
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Hint |
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11. |
Stan the Hot Dog Man sells 100 hot dogs per day for $2 each, so his daily revenue is $200. He estimates that for every 25 cents he increases the price of a hot dog, he will sell 5 fewer. What range of prices can he charge so that his daily revenue is at least $225? |
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A. |
$3.00-$4.50 |
B. |
$2.00-$4.00 |
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C. |
$2.25-$2.50 |
D. |
$2.50-$4.50 |
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Hint |
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12. |
Name the sets of numbers to which  belongs. |
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A. |
Integers, Rationals, and Reals |
B. |
Naturals, Wholes, Integers, Rationals, and Reals |
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C. |
Irrationals and Reals |
D. |
Rationals and Reals |
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Hint |
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13. |
Which is true for the following system of equations?
3x -  y = 1
x + 2y = 7. |
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A. |
y = x |
B. |
y > x |
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C. |
cannot be determined from information given |
D. |
y < x |
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Hint |
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14. |
Which of the following is not a vertex of the figure formed by  |
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A. |
(6, 4) |
B. |
(2, –1) |
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C. |
(0, 2) |
D. |
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Hint |
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15. |
Solve the system 4y – 6x + 8z = 13, 10y – 15x + 20z = 6, y – 5x + 2z = 5. |
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A. |
no solution |
B. |
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C. |
infinite solutions |
D. |
(-3, 1, 7) |
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Hint |
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16. |
At a firm, there are three workers that are supposed to work a combined 110 hours per week. Worker 1 is supposed to work 5 hours more than worker 2, and worker 2 is supposed to work 15 hours more than worker 3. How long should each one work? |
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A. |
worker 1: 40worker 2: 45worker 3: 25 |
B. |
worker 1: 42.5worker 2: 37.5worker 3: 30 |
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C. |
worker 1: 45worker 2: 40worker 3: 25 |
D. |
worker 1: 45worker 2: 35worker 3: 30 |
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Hint |
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17. |
State whether the product of A3 × 4 and B3 × 4 is defined, and if it is defined, state the dimensions. |
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A. |
defined, 9 × 16 |
B. |
defined, 4 × 3 |
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C. |
undefined |
D. |
defined, 3 × 4 |
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Hint |
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18. |
Given that   and  use the fact that  to find AB + AC. |
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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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19. |
If the vertex of a parabola is (3, -4), what is its axis of symmetry? |
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A. |
y = -4 |
B. |
x = 3 |
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C. |
y = 3 |
D. |
x = -4 |
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Hint |
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20. |
A quadratic function has two real roots. How many times does the graph cross the x-axis? |
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A. |
1 |
B. |
cannot be determined from given information. |
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C. |
0 |
D. |
2 |
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Hint |
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