Simplify the expression. Assume that all variables are positive. ? 

A. x4/11
B. x3/11
C. x19/28
D. x4/28

Answer: C

Mathematics

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Find the quadratic approximation of f at x = 0.f(x) = tan 9x

A. Q(x) = 1 + 9x2
B. Q(x) = 1 - x2
C. Q(x) = 1 + x2
D. Q(x) = 9x

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Convert the mixed number into an improper fraction.-17

A. - 
B. - 
C. - 
D. - 

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Solve the problem.Your cable bill increased last year. For the first 5 months your bill was $25.89 each month. For the remaining 7 months it was $27.89 each month. Find the average amount of your cable bill for the year.

A. $32.47 B. $324.68 C. $27.06 D. $26.89

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Add or subtract.[(1 + 8i) - (8 + 9i)] - (1 - 6i)

A. 10 + 5i B. 10 + 11i C. -8 + 11i D. -8 + 5i

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