Solve the problem.The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands). By using linear regression, the following function is obtained: 
where x is the cost of advertising (in thousands of dollars) and y is number of products sold (in thousands). Use this function to predict the number of products sold if the cost of advertising is $5000.
A. 66.75
B. 69.75
C. 14,005.8
D. 76.45
Answer: B
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Solve the problem.In the weighted voting system 
,
A. P1 and P2 have veto power, P3 is a dummy. B. P1 has veto power, P3 is a dummy. C. all three players have veto power. D. no player has veto power. E. none of these
Multiply and simplify any radicals in your answer. Assume that all variables represent positive real numbers.(2x
)(2x
)
A. 24x3
B. 28x
C. 24x2
D. 28x2
Simplify the complex rational expression.
A. 1
B. 
C. 
D. 16
Solve the problem.Tickets to a ballet cost $14 if bought in advance. If bought on the date of the ballet, they cost $24. For the ballet to make a profit, the total money collected from ticket sales must be at least $380. Write an inequality to represent this situation, using x for the number of tickets bought in advance and y for the number of tickets bought on the date of the ballet. Do not solve the inequality.
A. 14x + 24y ? 380 B. 14x - 24y ? 380 C. 14x - 24y ? 380 D. 14x + 24y ? 380