Solve and graph the solution set on a number line.|x + 7| < 5
A. ?
B. (-?, -12) ? (-2, ?)
C. [-12, -2]
D. (-12, -2)
Answer: D
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Use a graphing utility to graph the function over the indicated interval and approximate any local maxima and local minima. Determine where the function is increasing and where it is decreasing. If necessary, round answers to two decimal places.f(x) = x3 - 3x + 1, (-2, 2)
A. local maximum at (1, -1) local minimum at (-1, 3) increasing on (-2, -1) and (1, 2) decreasing on (-1, 1) B. local maximum at (-1, 3) local minimum at (1, -1) increasing on (-2, -1) and (1, 2) decreasing on (-1, 1) C. local maximum at (1, -1) local minimum at (-1, 3) increasing on (-2, -1) decreasing on (-1, 1) D. local maximum at (-1, 3) local minimum at (1, -1) increasing on (-1, 1) decreasing on (-2, -1) and (1, 2)
Use properties of logarithms to expand the logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator.logb 
A. logbx + logby3 - logbz6 B. logbx + logby3 + logbz6 C. logbx + 3logby + 6logbz D. logbx + 3logby - 6logbz
Use Cramer's rule to solve the system.
A. {(6, -1, 2)} B. {(5, 1, 2)} C. {(1, 2, 1)} D. {(5, -1, -2)}
Eliminate the parameter to obtain a Cartesian equation of the curve.x = 7 cos t, y = 7 sin t, 0 ? t ? 2?
A. x2 - y2 = 7, -7 ? x ?7 B. x2 - y2 = 49, -7 ? x ?7 C. x2 + y2 = 7, -7 ? x ?7 D. x2 + y2 = 49, -7 ? x ?7