Find the intervals on which the function is increasing and the intervals on which the function is decreasing.f(x) = 2x2 + 8x - 10

A. Increasing on (-4, ?); decreasing on (-?, -4)
B. Increasing on (8, ?); decreasing on (-?, 8)
C. Increasing on (2, ?); decreasing on (-?, 2)
D. Increasing on (-2, ?); decreasing on (-?, -2)


Answer: D

Mathematics

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Find the equation of the set of points P satisfying the given condition.The sum of the distances of P from (0, ±1) is 6.

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

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Replace the question mark with inequality symbol < or >.6 ? 0

A. < B. >

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Solve the problem.To the nearest dollar, the average tuition at a public four-year college was  the year Jane enrolled there and  when her sister began college 2 years later. Find, to the nearest dollar per year, the rate at which tuition was increasing.

A. $118 per year B. $124 per year C. $107 per year D. $128 per year

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Find the distance between the pair of points. Express your answer in simplest radical form.(4, 2) and (7, 3)

A. 2 units
B.  units
C. 10 units
D. 8 units

Mathematics