Solve the system.
A. x = -1, y = 3, z = 6, w = 1
B. x = -4, y = -5, z = 10, w = 4
C. x = 4, y = -1, z = 5, w = -4
D. x = 4, y = -2, z = 0, w = 4
Answer: C
Mathematics
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Find the component form of the specified vector.The vector from the point A(9, 7) to the origin
A. 
B. 
C. 
D. 
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Solve.
x = - 
A. - 
B. - 
C. - 
D. - 
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Find the vertex, focus, and directrix of the parabola with the given equation.(x - 2)2 = -4(y - 1)
A. vertex: (2, 1) focus: (2, 0) directrix: y = 2 B. vertex: (1, 2) focus: (1, 1) directrix: y = 3 C. vertex: (-2, -1) focus: (-2, -2) directrix: y = 0 D. vertex: (2, 1) focus: (2, 2) directrix: x = 0
Mathematics