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1. |
Write the matrix equation  as a system of linear equations. |
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A. |
-2s = 7
5t = 12 |
B. |
-2s + 5t = 7
s + 8t = 12 |
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C. |
-2s + t = 7
5s + 8t = 12 |
D. |
-2s + t = 12
5s + 8t = 7 |
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Hint |
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2. |
Given that the inverse of the coefficient matrix is  , solve the matrix equation  . |
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A. |
(4, 3) |
B. |
(-4, 3) |
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C. |
(-2, 3) |
D. |
(2, 4) |
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Hint |
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3. |
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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4. |
Solve the system of equations 7x – 14y =4, 3x – 6y =17. |
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A. |
(3, –2) |
B. |
no unique solution |
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C. |
(2, 1) |
D. |
infinite solutions |
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Hint |
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5. |
Solve the system of equations4x – 2y = 2, –3x + 7y = –29 |
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A. |
(–2, –5) |
B. |
(2, –5) |
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C. |
no solution |
D. |
(–2, 5) |
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Hint |
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