Find the directrices of the hyperbola.y2 - 16x2 = 16
A. y = ± 
B. x = ± 
C. y = ± 
D. y = ± 
Answer: A
Mathematics
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A. x ? 2.000 B. x ? 5.000 C. x ? 10.000 D. x ? 2.789
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Solve the system of equations.
A. (-6, -2) B. ? C. (6, -1) D. (-7, -1)
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Write the fraction as a percent. Round to the nearest tenth of a percent if necessary.
A. 0.1% B. 10% C. 100% D. 1%
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Solve. 5x - 4y + 10z = -310x + 2y - 15z = 2115x - 2y + 10z = 0
A. 
B. 
C. 
D. 
Mathematics