Find the limit, if it exists.

A. Does not exist
B.
C. 0
D.


Answer: D

Mathematics

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Decide if the given number is a solution to the given equation.9x2 + 7 = 61;  3

A. No B. Yes

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Find the vertex of the graph of the quadratic function.f(x) = -x2 - 10x + 9

A. (5, -16) B. (-10, 9) C. (-5, 34) D. (5, -66)

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Solve.Given f(x) = x2 + 5x + 6, find all values for x for which f(x) > 0.

A. (-?, -3) B. (-3, -2) C. (-2, ?) D. (-?, -3) ? (-2, ?)

Mathematics

Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cos ? = - ,   < ? < ?Find cos(2?).

A. - 
B.
C.
D. - 

Mathematics