Add or subtract as indicated. Express the answer as a single polynomial in standard form.(8x4 - 14x3) - (-17x4 + 20x3)

A. -9x7
B. -9x4 + 6x3
C. 25x4 + 6x3
D. 25x4 - 34x3


Answer: D

Mathematics

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The function f is one-to-one. Find its inverse.f(x) = 

A. f-1(x) = (x + 1)2
B. f-1(x) = 
C. f-1(x) = x2 - 1, x ? 0

D. f-1(x) = x2 + 1, x ? 0

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Express the sum using summation notation with a lower limit of summation not necessarily 1 and with k for the index of summation.13 + 17 + 21 + 25 + ... + 45

A.
B.
C.
D.

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Determine whether the function is a probability density function over the given interval.f(x) = x2, [0, 2]

A. No B. Yes

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Solve the application.A telephone costs $321. If the sales tax rate is 0.02, what is the total price? Round your answers to the nearest cent.

A. $330.63 B. $327.42 C. $385.20 D. $324.21

Mathematics