Using the restrictions stated for the function, find a rule for f-1.f(x) = x2 - 15, x ? 0
A. f-1(x) = 
B. f-1(x) = - 
C. f-1(x) = - 
D. f-1(x) = x2 + 15
Answer: B
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Perform the indicated operation.5 gal 2 qt × 2
A. 10 gal B. 11 gal 2 qt C. 11 gal D. 12 gal
Express the exercise as a system of linear equations, then find the solution. Use a calculator where appropriate.A barge takes 2 hours to move (at a constant rate) downstream for 16 miles, helped by a current of 3 miles per hour. If the barge's engines are set at the same pace, find the time of its return trip against the current.
A. 8 hr B. 2 hr C. 32 hr D. 5 hr
Find the integral.
A. 30 cos x5 + C
B. 6 cos x5 + C
C. 
cos x5 + C
D. 
x5 cos x5 + C
Write the equation of the graph in its final position.The graph of y = ex is translated 6 units to the right and then 7 units upward.
A. y = ex + 7 + 6 B. y = ex - 6 + 7 C. y = ex - 7 + 6 D. y = ex + 6 + 7