Solve the equation by the method of your choice. Simplify irrational solutions, if possible.2x2 + 12x = - 3
A. 
B. 
C. 
D. 
Answer: C
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Write a description of the shaded region using the symbols A, B, C, ?, ?, -, and ' as needed.
A. C ? B' ? A B. A ? C C. B' ? A ? C D. A ? C - B
Use a double-angle identity to find the exact value of the expression.2 cos2 75° - 1
A. - 
B. 
C. - 
D. 
Write a system of equations for the problem, and then solve the system.The manager of a candy shop sells chocolate covered nuts for $7 per pound and chocolate covered raisins for $14 per pound. The manager wishes to make a 490-pound 
mixture that will sell for $8 per pound. How many pounds of each should be used?
A. Nuts: 280 lb; raisins: 210 lb B. Nuts: 70 lb; raisins: 420 lb C. Nuts: 420 lb; raisins: 70 lb D. Nuts: 245 lb; raisins: 245 lb
Solve the problem.What is 50% of 16 minutes?
A. 16 minutes B. 800 minutes C. 8 minutes D. 0.8 minutes