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1. |
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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2. |
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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3. |
Evaluate  using expansion by minors. |
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A. |
64 |
B. |
80 |
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C. |
14 |
D. |
68 |
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Hint |
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4. |
If  , find N -1. |
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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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5. |
Write a matrix for the system of equations. 
|
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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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6. |
The matrix  is an example of which of the following matrices? |
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A. |
column matrix |
B. |
square matrix |
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C. |
row matrix |
D. |
all of the above |
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Hint |
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7. |
Solve  |
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A. |
(–2, 1) |
B. |
(–1, 2) |
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C. |
(2, –1) |
D. |
(1, –2) |
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Hint |
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8. |
If  and  find 4A – 5B. |
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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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9. |
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. |
defined, 3 × 4 |
D. |
undefined |
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Hint |
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10. |
Suppose  has vertices A(3, 4), B(-2, 1) and C(2, –3). Dilate so that its perimeter is one-fourth the original perimeter. What are the coordinates of the vertices 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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11. |
What are the coordinates of the vertices of the image of rectangle HJKL with H(4, 1), J(-3, -2), K(2, -6), and L(-4, 5) after a reflection across the x-axis? |
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A. |
H'(-4, 1), J'(3, -2), K'(-2, -6), L>'(4, 5) |
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B. |
H'(-4, –1), J'(-3, -2), K'(-2, -6), L'(-4, -5) |
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C. |
H'(-4, –1), J'(3, 2), K'(-2, 6), L'(4, -5) |
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D. |
H'(4, –1), J'(-3, 2), K'(2, 6), L'(-4, -5) |
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Hint |
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12. |
Evaluate  |
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A. |
111 |
B. |
37 |
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C. |
–51 |
D. |
–654 |
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Hint |
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13. |
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 = $2.10
item B = $1.14 |
B. |
item A = $3
item B = $5.50 |
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C. |
item A = $5.50
item B = $3 |
D. |
item A = $1.14
item B = $2.10 |
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Hint |
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14. |
Solve 2.4x + 1.7y = 8.2, 3.8x – 0.8y = 5.3. Round to the nearest hundredth. |
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A. |
(–1.86, –2.20) |
B. |
(–1.86, 2.20) |
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C. |
(1.86, –2.20) |
D. |
(1.86, 2.20) |
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Hint |
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15. |
Find the inverse of  if it exists. |
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A. |
 |
B. |
does not exist, since ad – bc = 0 |
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C. |
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D. |
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Hint |
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16. |
Which of the following is a matrix equation for the system 5x – 3y =11, –3x + 2y = 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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