Solve using matrices.4x + 9y - z = 21 x - 5y + 7z = -2 8x + y + z = 11
A. (-1, 2, 2)
B. (1, 1, 2)
C. (2, 1, 1)
D. (1, 2, 1)
Answer: D
Mathematics
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A. {-1, 4, 5} B. {-5, 1, 4} C. {1, 5} D. {-1, -5}
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A. {(3, 4)} B. {(4, 4)} C. {(x, x + 3)} D. ?
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Graph the system of inequalities, and find the coordinates of the vertices.y ? 4 - 2xx ? 1
A. 
B. 
C. 
D. 
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