Simplify the radical.2

A. 40
B. 8
C. 20
D. 4

Answer: D

Mathematics

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Find the equation of the parabola determined by the given information.Vertex at the origin, focus at (0, -4)

A. y2 = -4x
B. y = - x2
C. y2 = -16x
D. y = - x2

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Mathematics

Find the quotient and write the answer in simplest form. Assume variables represent nonnegative values.

A.
B. 3 
C. 3
D. 2

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Mathematics

Factor the trinomial completely.27x2 - 117x - 90

A. (27x + 18)(x - 5) B. 9(3x - 2)(x + 5) C. 9(3x + 2)(x - 5) D. prime

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Mathematics

Find a rectangular equation for the plane curve defined by the parametric equations.x = 7 sin t, y = 7 cos t; 0 ? t ? 2?

A. y = x2 - 9; for x in -2 ? x ? 2
B. y2 - x2 = 49; for x in -? < x < ?
C. x2 + y2 = 49; for x in -7 ? x ? 7
D. y =  = 49; for x in -? < x < ?

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Mathematics