Find the solution set of the system.
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A. ?
B. ?
C. ?
D. ?
Answer: B
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Use a graphing calculator to graph the polar equation. Make sure that you choose a sufficiently large interval for the parameter so that the entire curve is drawn.r = 6 sin 
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Solve the problem.In an analysis of traffic, a certain city estimates the traffic flow as illustrated in the figure below, where the arrows indicate the flow of traffic. If x1 represents the number of cars traveling from intersection A to intersection B, x2 represents the number of cars traveling from intersection B to intersection C, and so on, we can formulate equations based on the principle that the number of vehicles entering the intersection equals the number leaving it. Formulate an equation for the traffic at each of the four intersections. 
A. x1 - x4 = -450 x1 - x2 = -650 x2 - x3 = -1400 x3 - x4 = 1100 B. x1 - x4 = 450 x1 - x2 = 650 x2 - x3 = 1400 x3 - x4 = 1100 C. x1 - x4 = 450 x1 - x2 = 650 x2 - x3 = 1400 x3 - x4 = -1100 D. x1 - x4 = -650 x1 - x2 = -450 x2 - x3 = 1400 x3 - x4 = -1100
Find the simple interest. Round to the nearest cent.Principal = $1,100Rate = 6.6%Time in years = 
A. $242.00 B. $24.20 C. $2.42 D. $72.60
Simplify. Assume that all variables represent positive real numbers.-
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