If the function is one-to-one, find its inverse. If not, write "not one-to-one."f(x) = -8x + 1
A. f-1(x) = - 
x - 
B. f-1(x) = - 
x + 1
C. f-1(x) = - 
x - 1
D. f-1(x) = - 
x + 
Answer: D
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Solve.A plane flying with a tailwind flew at a speed of 420 mph, relative to the ground. When flying against the tailwind, it flew at a speed of 310 mph. Graph the system to find the speed of the plane in calm air and the speed of the tailwind.
A. Speed of plane: 375 mph Speed of tailwind: 45 mph B. Speed of plane: 45 mph Speed of tailwind: 375 mph C. Speed of plane: 55 mph Speed of tailwind: 365 mph D. Speed of plane: 365 mph Speed of tailwind: 55 mph
Write out the first five terms of the sequence.an = (-1)n - 1 
A. - 2, 1, 
, - 
, 
B. - 2, 1, - 
, 
, - 
C. 2, 
, 
, 
, 
D. 2, - 1, 
, - 
, 
Solve.The table shows one family's utility bills for the first nine months of the year.
Find the range.
A. $120 B. $508 C. $94 D. $513
Solve the problem.A company determines that its marginal revenue per day is given by src="https://sciemce.com/media/4/ppg__tttt0604190834__f1q60g6.jpg" alt="" style="vertical-align: -4.0px;" /> in dollars, on the tth day. Find the total profit from 
and that 
where 
in dollars, on the tth day. The company's marginal cost per day is given by 
and that 
, where 
to 
(the first 7 days). Round your answer to the nearest dollar.Note: 
A. $119,675
B. $119,689
C. $119,685
D. $119,795