Find an equation for the hyperbola described.Vertices at (±3, 0); foci at (±9, 0)

A.  -  = 1
B.  -  = 1
C.   -  = 1
D.   -  = 1

Answer: C

Mathematics

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A.  
B. -1
C. -  
D. 1

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Find the area of the figure.

A. 1352 
B. 507
C. 676 
D. 1352

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Find all values of ? in [0°, 360°) that satisfy the equation.sin ? = - 

A. 45°, 315° B. 135°, 225° C. 225°, 315° D. 45°, 225°

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Find the partial derivative.f(x, y) = x ln (9x + 4y). Find .

A. fx(x, y) =  + ln (9x + 4y)
B. fx(x, y) = 
C. fx(x, y) = ln (9x + 4y)
D. fx(x, y) = ln (9x + 4y) + 

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Mathematics