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1. |
Solve  |
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B. |
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D. |
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Hint |
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2. |
Write  in standard form where A, B, and C are integers whose greatest common factor is 1. |
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A. |
3x - 8y = 16 |
B. |
3x - 8y = 2 |
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C. |
3x + 8y = 16 |
D. |
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Hint |
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3. |
Which function is not linear? |
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A. |
f(x) = 2x3 |
B. |
f(x) = 14x + 7 |
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C. |
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D. |
f(x) = 8 |
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Hint |
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4. |
Write an equation of the line that passes through (10,-4) and is perpendicular to the line whose equation is  |
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B. |
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5. |
A best-fit line drawn on a scatter plot ________ |
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A. |
approximates the linear relationship of data points. |
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B. |
is a line that goes through every data point. |
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C. |
always has a positive slope. |
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D. |
must be drawn through the first and last data points. |
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Hint |
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6. |
What is the first step in solving the system of equations using the elimination method? 
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A. |
Add the equations. |
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B. |
Subtract the second equation from the first equation. |
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C. |
Solve the first equation for x. |
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D. |
Multiply the second equation by 2. |
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Hint |
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7. |
Solve the system of equations. 
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A. |
(13, 0, -4) |
B. |
(10, -1, 11) |
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C. |
(1, -4, 6) |
D. |
(7, -2, 1) |
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Hint |
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8. |
Find A - B if  and  |
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B. |
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D. |
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9. |
For the determinant  , which is the minor of -4? |
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B. |
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C. |
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D. |
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Hint |
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10. |
Evaluate  using diagonals. |
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A. |
21 |
B. |
33 |
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C. |
37 |
D. |
107 |
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Hint |
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11. |
If  what is the value of  |
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A. |
89 |
B. |
29 |
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C. |
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D. |
27 |
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Hint |
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12. |
Graph the solution set to the inequality 5x – 3 < 3x + 7. |
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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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13. |
Suppose a plant grows one inch every year. If x is how old the plant is (in years), and f (x) is how tall the plant is (in inches), what type of function is f (x)? |
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A. |
absolute value function |
B. |
identity function |
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C. |
constant function |
D. |
step function |
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Hint |
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14. |
Choose the ordered pair that satisfies 7x – 15y < -13. |
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A. |
(0, -2) |
B. |
(2, -3) |
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C. |
(-2, 0) |
D. |
(1, 1) |
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Hint |
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15. |
The Waxmans just opened a carpet store. Their startup costs were $5000, and their cost of carpet is $8 per square yard. How many square yards of carpet do they need to sell in order to break even if they sell the carpet for $18 per square yard? |
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A. |
50 square yards |
B. |
500 square yards |
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C. |
278 square yards |
D. |
192 square yards |
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Hint |
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16. |
Find the coordinates of the vertices of the figure formed by  |
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A. |
(–4, 0), (3, 4), (5, 2) |
B. |
(–4, 0), (5, 4), (5, 2) |
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C. |
(–3, 0), (5, 4 ), (5, 2) |
D. |
(–3, 0), (3, 4), (5, 2) |
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Hint |
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17. |
Which of the following is an example of a column matrix? |
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A. |
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B. |
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D. |
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Hint |
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18. |
If  and  find 4A – 5B. |
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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. |
Determine whether the pair of matrices  are inverses. |
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A. |
no, because fractions cannot be a part of an inverse |
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B. |
yes, because A · B = I |
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C. |
no, because A · B  I |
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D. |
yes, because each entry in the second matrix is the reciprocal of its corresponding entry in the first matrix |
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Hint |
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20. |
In order for a matrix to have an inverse, what must be true? |
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A. |
ad – bc = 0 |
B. |
ad – bc 1 |
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C. |
ad – bc 0 |
D. |
ad – bc = 1 |
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Hint |
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