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1. |
What is the first step in solving the matrix equation
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A. |
Multiply each side of the matrix equation by the identity matrix. |
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B. |
Multiply each side of the matrix equation by  |
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C. |
Divide each side of the matrix equation by  |
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D. |
Find the inverse of  |
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Hint |
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2. |
Solve using inverse matrices. |
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A. |
(-4, 4) |
B. |
(-4, 0) |
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C. |
(4, -4) |
D. |
(4, 4) |
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Hint |
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3. |
In a sport similar to football, there are two ways to score: by the run or by the pass. Team A scored 244 points, while Team B scored 273 points. Team A scored by the pass 21 times, and by the run 11 times. Team B scored by the pass 27 times, and by the run 6 times. How many points is each score worth? |
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A. |
pass = 7 pointsrun = 14 points |
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B. |
pass = 5 pointsrun = 23 points |
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C. |
pass = 5 pointsrun = 9 points |
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D. |
pass = 9 pointsrun = 5 points |
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Hint |
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4. |
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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5. |
Solve the system of equations 7x – 14y =4, 3x – 6y =17. |
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A. |
no unique solution |
B. |
(3, –2) |
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C. |
infinite solutions |
D. |
(2, 1) |
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Hint |
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