Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation. 8x - y - 3z = 28 8x + 4y - 5z = 60-7x - 9y + z = -110
A. (6, 8, 4)
B. (-6, 8, 12)
C. (6, 4, 8)
D. No solution
Answer: A
Mathematics
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? 
A. 
B. 
C. 
D. 
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Find the directrices of the ellipse.
+ 
= 1
A. y = ± 
B. x = ± 
C. x = 2 ± 
D. y = -9 ± 
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A. Tens B. Ten-millions C. Hundreds D. Ones
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