Find the equation of an ellipse that contains the following points.(-5, 0), (5, 0), (0, -8), and (0, 8)

A. 25x2 + 64y2 = 1
B.  +  = 1
C.  +  = 1
D.  +  = 1

Answer: D

Mathematics

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Add or subtract as indicated. You will need to simplify terms to identify like radicals.-3 + 7

A. -33
B. 33
C. 9 
D. -9 

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Solve the system by the addition method.y = x2 + 4y = -x2 + 6

A. {(1, 5), (1, -5), (-1, 5), (-1, -5)} B. {(5, 1), (5, -1)} C. {(1, 5), (1, -5)} D. {(1, 5), (-1, 5)}

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Solve the problem.A zoom lens in a camera makes a rectangular image on the film that is  length by  width. As the lens zooms in and out, the size of the image changes. Find the rate at which the area of the image begins to change  if the length of the frame changes at  and the width of the frame changes at 

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A. 4.4 cm2/sec
B.  cm2/sec
C. 5.6 cm2/sec
D. 1.1 cm2/sec

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Factor the sum or difference of two cubes.8 - 27x3

A. (2 - 3x)(4 + 9x2) B. (8 - 3x)(1 + 6x + 9x2) C. (2 - 3x)(4 + 6x + 9x2) D. (2 + 3x2)(4 - 6x + 9x2)

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Mathematics