Solve the system of equations by determinants. -4x + y - 2z - t = 10 -x - 4y + z + 3t = 16 -4x - 2y - 4z + t = 22 -2x - y - z + 3t = 15
A. x = -3, y = -2, z = -1, t = 2
B. x = -1, y = 0, z = 1, t = 4
C. Inconsistent
D. x = -3, y = 2, z = 1, t = -2
Answer: A
Mathematics
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A. vertex: (3, -2)
focus: (3, -2.25)
directrix: y = -1.75
B. vertex: (-3, 2)
focus: (-3, 1.75)
directrix: y = 2.25
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focus: (-3.25, 2)
directrix: x = -2.75
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focus: (2.75, -2)
directrix: x = 3.25
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> 0
A. 
B. 
C. 
D. 
Mathematics