Solve the system of equations using elimination.
A. x = 1, y = 3; x = -1, y= -3
B. x= 1, y = 3; x = 1, y = -3; x = -1, y = 3; x = -1, y = -3
C. x = 2, y = -3; x = -2, y = 3
D. x = 2, y = 3; x = 2, y = -3; x = -2, y = 3; x = -2, y = -3
Answer: D
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Find the focus and directrix of the parabola with the given equation.9y2 = -4x
A. Focus: 
, directrix: y = 
B. Focus: 
, directrix: x = - 
C. Focus: 
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D. Focus: 
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Tyler paid 
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