Find the slope of the polar curve at the indicated point.r = 9(1 + cos?), ? = 
A. 1 - 
B. 4
C. 
D. -2
Answer: A
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Use Gaussian elimination or Gauss-Jordan elimination to solve the problem.A basketball fieldhouse seats 15,000. Courtside seats sell for $8, end zone for $7, and balcony for 
Total for a sell-out is 
If half the courtside and balcony and all end zone seats are sold, ticket sales total 
. How many of each type of seat are there?
A. 4000 courtside 3000 end zone 8000 balcony B. 3200 courtside 1800 end zone 10,000 balcony C. 3000 courtside 2000 end zone 10,000 balcony D. Cannot be determined
Solve the problem.On the first of January, the temperature was 7 degrees above zero. On the 15th of the month, it was 3 degrees below zero. At the end of the month on the 31st, it was 20 degrees below zero. Graph the three temperatures on a number line. Which of the three days was the warmest? 
A. January 1
B. January 15
C. January 31
Solve the problem.The price of a necklace is $6.99. If the salesperson's rate of commission is 14%, how much commission is earned on the sale of the necklace? Round to the nearest cent.
A. $9.89 B. $9.79 C. $0.99 D. $0.98
Simplify the expression. Assume that all variables are positive when they appear.
A. 
B. 
C. 5
D. 5