Find an equation for the ellipse described.Center at (0, 0); focus at (-4, 0); vertex at (5, 0)

A.  +  = 1
B.  +  = 1
C.  +  = 1
D.  +  = 1


Answer: B

Mathematics

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A. (3x2 + 3)(x2 - 8) B. (x2 + 3)(3x2 - 8) C. (x + 3)(8x - 3) D. prime

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Find x: 140 = e-2ú4x

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