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1. |
Use Cramer's rule to find the value of x in the system of equations. 
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A. |
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B. |
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Hint |
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2. |
Use Cramer's rule to solve the system of equations. 
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A. |
(0.4, 0.2) |
B. |
(-0.4, -0.2) |
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C. |
(0.2, 0.4) |
D. |
(0.011, 0.0055) |
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Hint |
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3. |
Which of the following cannot be true concerning Cramer's Rule for two variables? |
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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 3x + 2y – z = –1, –2x + –3y + 2z = 5, 4x – y + 3z = 11. |
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A. |
(1, 4, –3) |
B. |
(2, 4, –2) |
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C. |
(2, –1, 2) |
D. |
(1, –1, 2) |
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Hint |
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5. |
Which method of finding solutions would work best to find the solutions to the system 12.4x – 3.66y = 12.19, 3.9x + 6.17y = 19.28, and why? |
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A. |
elimination, because Cramer's Rule doesn't apply to this problem |
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B. |
Cramer's Rule, because there are fewer calculations. |
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C. |
elimination, because 6.17 is a factor of 3.66 |
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D. |
Cramer's Rule, because none of the other methods will correctly solve the problem |
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Hint |
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