Find the equation in standard form of an ellipse centered at the origin that passes through the given points.(-4, 0), (4, 0), (0, -9), and (0, 9)

A. 16x2 + 81y2 = 1
B.  +  = 1
C.  +  = 1
D.  +  = 1

Answer: D

Mathematics

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Graph.2y2 + 2x2 = 18

A.

B.

C.

D.

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Mathematics

Simplify. Assume all variables and radicands represent nonnegative real numbers.

A. 3xy
B. 3x
C. 3x2 
D. 3xy2 

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Mathematics

Solve the problem.Suppose that y varies directly as the 3/2 power of x, and that y = 192 when x = 16. Find y when x = 9.

A. 3 B. 192 C. 48 D. 81

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Mathematics

Solve the problem.In Baseball, the magic number M is given by the polynomial  where W1 is the number of wins for the first-place team, L2 is the number of losses for the second-place team, and G is the total number of games in the season, which is 162 in the major leagues. Compute the magic number for city A in the major league. 

A. 13 B. 14 C. 15 D. 16

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Mathematics