Solve and check. Identify any extraneous solutions.
= 5+ 
A. -5
B. - 
C. 5
D. No solution (5 is extraneous)
Answer: D
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 
A. Domain: all points in the xy-plane excluding x = 0; range: real numbers z ? 0; level curves: parabolas 
B. Domain: all points in the xy-plane excluding x = 0; range: all real numbers; level curves: parabolas 
C. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: parabolas 
D. Domain: all points in the xy-plane; range: all real numbers; level curves: parabolas 
Find the requested function value for the given function. Round the answer to the nearest tenth when necessary.If f(x) = 
, find the value of f(3).
A. 10 B. 2.4 C. 6 D. 3.2
Solve.David recently switched to a long distance phone company which charges a monthly fee of $7.95 plus $0.06 per minute. Find a linear function that expresses the monthly bill B as a function of minutes used m.
A. B(m) = 0.06m + 7.95 B. B(m) = 7.95m + 0.06 C. B(m) = 8.01m D. B(m) = 0.06m + 7.95m
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) = x5 - x2; (-2, 2)
A. local maximum at (0.74, -0.33) local minimum at (0, 0) increasing on [-2, 0] and [0.74, 2] decreasing on [0, 0.74] B. local maximum at (0, 0) local minimum at (0.74, -0.33) increasing on [0, 0.74] decreasing on [-2, 0] and [0.74, 2] C. local maximum at (0.74, -0.33) local minimum at (0, 0) increasing on [0, 0.74] decreasing on [-2, 0] and [0.74, 2] D. local maximum at (0, 0) local minimum at (0.74, -0.33) increasing on [-2, 0] and [0.74, 2] decreasing on [0, 0.74]