Simplify the algebraic expression.6a - 3a2 + 2a
A. 5a3
B. 8a + 2a2
C. 8a - 3a2
D. 8a - 3
Answer: C
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Solve the problem.Jane wants to buy a photocopier. The salesman has the following information on 3 models. If all 3 are used, a specific job can be done in 50 minutes. If copier A operates for 20 minutes and copier B for 50 minutes, one-half the job is finished. If copier B operates for 30 minutes and copier C for 80 minutes, three-fifths of the job is done. Which is the fastest copier, and how long does it take for this copier to finish the whole job?
A. B is fastest; 100 min B. C is fastest; 120 min C. C is fastest; 100 min D. A is fastest; 120 min
Convert the rectangular equation to a polar equation that expresses r in terms of ?.y = 2
A. r = 
B. r = 2
C. sin ? = 2
D. r = 
Graph the system of inequalities and the points of intersection of the graphs. Label the points of intersection with their coordinates.y ? x2 - 5y + 2x < 10 
A. 
B. 
C. 
D. 
Write the complex number in polar form. Express the argument in degrees.6i
A. 6(cos 270° + i sin 270°) B. 6(cos 90° + i sin 90°) C. 6(cos 180° + i sin 180°) D. 6(cos 0° + i sin 0°)