Add or subtract vertically.Subtract x4 - 4x3 + x2 - 9x from 4x4 + 9x3 + 5.

A. 3x4 + 13x3 + x2 - 4x
B. 3x4 + 13x3 + x2 - 9x + 5
C. 3x4 + 13x3 - x2 + 9x + 5
D. 3x4 + 5x3 - x2 - 9x + 5


Answer: C

Mathematics

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Use the definition f'(x) =  to find the derivative at x.f(x) = 3x4 - 9x3 + 4

A. 3x3 - 9x2 + 4 B. 12x3 - 27x2 + 4 C. 3x3 - 9x2  D. 12x3 - 27x2 

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Perform the indicated operation and express in lowest terms. - 

A.
B.
C.
D.

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Find a polynomial of degree 3 with real coefficients that satisfies the given conditions.Zeros: -2, 1, 0; f(2) = 40

A. 5x2 + 5x - 10 B. 5x3 + 15x2 - 10x C. 5x3 - 5x2 - 10x D. 5x3 + 5x2 - 10x

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Determine the amplitude or period as requested.Period of y = 4 cos x

A.
B. 2?
C. ?
D. 4

Mathematics