Solve the problem.At the two points where the curve x2 - xy + y2 = 16 crosses the x-axis, the tangents to the curve are parallel. What is the common slope of these tangents?

A. 1
B. -1
C. -2
D. 2

Answer: D

Mathematics

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A.

B.

C.

D.

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A. 1
B. 22
C.
D.

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Convert the given equation to a rectangular equation.r = 

A. x2 - 8y2 + 6y - 1 = 0 B. 8x2 - y - 6x + 1 = 0 C. 8x2 - y2 - 6x + 1 = 0 D. x2 + y2 - 6x + 1 = 0

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Simplify.- 

A.  
B. -  
C. Not a real number
D. -  

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