Solve the problem.Find the value of k so that the following expression will be a perfect square trinomial. kx2 + 56x + 16

A. -7
B.  4
C. 49
D. 7


Answer: C

Mathematics

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A. 132.057 B. 117.457 C. 40.556 D. 45.370

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Graph the function on the indicated interval.y =  cos (?x), 0 ? x ? 4 

A.

B.


C.

D.

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Combine like terms.-8z - (-3z)

A. -11z B. -5z C. 5z D. -5z2

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Perform the indicated operation. Simplify if possible. + 

A.
B.
C.
D.

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