Evaluate the polynomial for the given values of the variables.Evaluate x2 - 4y2 - xy for x = 2 and y = -4.
A. 76
B. 60
C. -68
D. -52
Answer: D
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Use the cofunction identities to find an angle ? that makes the statement true.sec (6? + 17°) = csc (2? - 7°)
A. ? = 40°
B. ? = 10°
C. ? = 
D. ? = 
Use a proportion to solve the problem.A building casts a shadow 39 m long. At the same time, the shadow cast by a 41-cm tall pole is 53 cm long. Find the height of the building. Round your answer to the nearest tenth of a meter.
A. 48.9 m B. 50.4 m C. 28.7 m D. 30.2 m
Answer the question.Which of the following statements is true concerning the graph of f(t) = sec t?
A. The graph is symmetric about the origin. B. The graph contains no symmetry. C. The graph is symmetric about x-axis. D. The graph is symmetric about y-axis.
Find the slope of the line.6x - 9y = 54
A. m = 
B. m = 6
C. m = 
D. m = - 