Write out the sum.

A. 2 + 3 + 4 + ... + (n + 1)2
B. 1 + 2 + 3 + ... + n
C. 4 + 9 + 16 + ... + (n + 1)2
D. (n + 1)2


Answer: C

Mathematics

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A. -2x3
B. -2x
C. -2
D. -4x

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Find the standard equation of the hyperbola.Vertices at (0, ±3), foci at (0, ±7)

A.  -  = 1
B.  -  = 1
C.  -  = 1
D.  -  = 1

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Graph the circle.x2 + y2 + 8x + 2y + 1 = 0

A.

B.

C.

D.

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Solve the problem.The quadratic function  models the median, or average, age, y, at which U.S. men were first married x years after 1900. In which year was this average age at a minimum? (Round to the nearest year.) What was the average age at first marriage for that year? (Round to the nearest tenth.)

A. 1951, 26.4 years old B. 1951, 47.4 years old C. 1952, 36 years old D. 1936, 47.4 years old

Mathematics