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
Mathematics
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. 
Mathematics
Determine whether the function is a probability density function over the given interval.f(x) = 
x2, [0, 2]
A. No B. Yes
Mathematics
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