Simplify the expression. Assume that all variables are positive when they appear.

A. ±9
B. 27
C. -9
D. 81

Answer: C

Mathematics

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Solve the problem.A piece of string is 5 feet long. Write this number as an improper fraction.

A.
B.
C.
D.

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Mathematics

Factor the trinomial completely, or state that the trinomial is prime.48x2 + 28xy + 4y2

A. prime B. (12x + 4y)(4x + y) C. 4(3x + y)(4x + y) D. 4(3x - y)(4x - y)

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Mathematics

Find the Taylor series for the given function. Give the interval of convergence.f(x) = 

A. 2 - 2x2 + 2x4 - 2x6 + . . . + (-1)n2x2n + . . . ; (-1, 1)
B. 2 - 2x2 + 2x4 - 2x6 + . . . + (-1)n2x2n + . . . ; (-?, ?)
C. 2 - 2x + 2x2 - 2x3 + . . . + (-1)n 2xn + . . . ; (-1, 1)
D. 2 - x2 + x4 - x6 + . . . + x2n + . . . ; (-1, 1)

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Mathematics

Simplify.

A.

5x

B. 3x2
C. 75x
D. 5

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Mathematics