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1. |
Name the multiplicative inverse of 5. |
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A. |
50 |
B. |
-5 |
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C. |
20 |
D. |
0.2 |
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Hint |
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2. |
Which is the standard form of a linear equation? |
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A. |
3x2 + y = 5 |
B. |
 |
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C. |
4x - 9y = 1 |
D. |
y = 2x - 3 |
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Hint |
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3. |
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. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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4. |
The scatter plot below shows the women's winning marathon times and the high temperatures on the marathon days. Which prediction equation best shows how marathon times and temperature are related? |
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A. |
 |
B. |
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C. |
 |
D. |
 |
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Hint |
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5. |
Solve the system of equations by using the elimination method. 
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A. |
(4, 2) |
B. |
(2, 3) |
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C. |
(34, -13) |
D. |
(12, -2) |
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Hint |
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6. |
Use Cramer's rule to solve the system of equations. 
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A. |
(-0.4, -0.2) |
B. |
(0.2, 0.4) |
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C. |
(0.4, 0.2) |
D. |
(0.011, 0.0055) |
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Hint |
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7. |
Find the minimum value of f(x, y) = 4x - 2y for the polygonal region determined by the feasible region. |
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A. |
-28 |
B. |
14 |
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C. |
-14 |
D. |
27 |
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Hint |
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8. |
Solve  . |
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A. |
(-2, -8) |
B. |
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C. |
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D. |
(2, 8) |
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Hint |
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9. |
Find the dimensions of A6 × 3 · B3 × 1. |
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A. |
3 × 3 |
B. |
3 × 1 |
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C. |
6 × 1 |
D. |
6 × 3 |
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Hint |
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10. |
Does the inverse of  exist? If it does not exist, explain why not. |
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A. |
Yes |
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B. |
No; the elements of the principal diagonal are not 1. |
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C. |
No; the determinant equals 0. |
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D. |
No; the matrix is not square. |
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Hint |
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11. |
Solve  using inverse matrices. |
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A. |
(-4, 4) |
B. |
(4, -4) |
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C. |
(4, 4) |
D. |
(-4, 0) |
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Hint |
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12. |
Name the property illustrated by the equation 5 ·? (-2 – 7) = 5 ·? -2 – 5 ·? 7. |
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A. |
Inverse Property |
B. |
Distributive Property |
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C. |
Associative Property |
D. |
Commutative Property |
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Hint |
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13. |
What is the slope of the line with equation  |
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A. |
-7 |
B. |
 |
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C. |
7 |
D. |
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Hint |
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14. |
What type of function is shown in the graph? |
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A. |
piecewise function |
B. |
absolute value function |
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C. |
step function |
D. |
constant function |
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Hint |
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15. |
What is the inequality represented in the graph? |
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A. |
x + 2y  4 |
B. |
x + 2y  4 |
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C. |
x + 2y > 4 |
D. |
x + 2y > 4 |
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Hint |
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16. |
What are the solutions to the system y + 2x – 5z = 4, –2y – 4x + 10z = 8, 3y + x – 3z = 5? |
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A. |
(2, 2, –2) |
B. |
(2, 2, 1) |
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C. |
infinite |
D. |
no solution |
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Hint |
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17. |
If  and  find 3A + 2B. |
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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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18. |
What translation matrix should be used to translate a figure with five vertices up 3 units and right 2 units? |
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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. |
Find the value of the determinant of  |
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A. |
64 |
B. |
–32 |
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C. |
2 |
D. |
6 |
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Hint |
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20. |
Vince and Brian each need two kinds of items at the store. Vince bought 10 of item A and 14 of item B, and spent $97. Brian bought 8 of item A and 25 of item B, and spent $119. How much did each item cost? |
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A. |
item A = $5.50
item B = $3 |
B. |
item A = $2.10
item B = $1.14 |
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C. |
item A = $3
item B = $5.50 |
D. |
item A = $1.14
item B = $2.10 |
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Hint |
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