Describe the curve represented by the equation. Identify the type of curve and its center (or vertex if it is a parabola). +  = 1

A. Parabola, (-1, -2)
B. Ellipse, (-1, -2)
C. Parabola, (-2, -1)
D. Hyperbola, (-2, -1)


Answer: B

Mathematics

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Solve the problem.A force of 1300 lb compresses a spring from its natural length of 15 in. to a length of 14 in. How much work is done in compressing it from 14 in. to 7 in.?

A. 41,000 lb?in. B. 0.024 lb?in. C. 82,000 lb?in. D. 32,000 lb?in.

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Solve the problem.The position of a particle moving along a coordinate line is s =  with s in meters and t in seconds. Find the particle's acceleration at 

A.  m/sec2
B. -  m/sec2
C. -  m/sec2
D. 1 m/sec2

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Find the amplitude, period, or phase shift of the given function as requested.Find the phase shift of y = -5 sin

A.
B.
C. ?
D.

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Find parametric equations for the rectangular equation.y = 3x2 + 6

A. x = t; y = 3t2 + 6; 0 ? t < ?
B. x = ; y = 3t + 6; t ? 0
C. x = t2; y = 3t + 6; 0 ? t < ?
D. y = t; x = 3t2 + 6; 0 ? t < ?

Mathematics