Perform the indicated operations and simplify the result. Leave the answer in factored form.
A. 12
B. x2
C. -12
D. 2x
Answer: D
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Find f-1(x) for the following one-to-one function f.f = {(-7, 3), (-1, 1), (6, 2), (8, 4)}
A. f-1 = {(-3, 7), (-1, -1), (2, -6), (4, -8)} B. f-1 = {(3, -7), (1, -1), (2, 6), (4, 8)} C. f-1 = {(-3, 7), (-1, 1), (-2, -6), (-4, -8)} D. f-1 = {(7, -3), (1, -1), (-6, -2), (-8, -4)}
Graph the function.y = 3 tan 2
A. 
B. 
C. 
D. 
Solve the problem.The following data show the list price, x, in thousands of dollars, and the dealer invoice price, y, also in thousands of dollars, for a variety of sport utility vehicles. Find a linear equation that approximates the data, using the points (16.5, 16.1) and (20.0, 18.3). 
A. y = 0.629x + 5.73 B. y = 1.59x - 9.11 C. y = 1.59x - 10.2 D. y = 0.629x + 6.38
Solve the problem.Some people treat acid reflux with the drug Pepcid. The number of milligrams N of Pepcid in an adult's bloodstream t hours after a 20 mg tablet is swallowed can be approximated by N = -0.09t(t - 12)3 . Approximately how long after a tablet is swallowed will there be 17 mg in the bloodstream? Use a graphing calculator and round to the nearest hundredth of an hour.
A. 0.08 hr, 9.3 hr B. 0.13 hr, 9.25 hr C. 0.19 hr, 9.35 hr D. 0.11 hr, 9.27 hr