Solve the problem.The Family Fine Arts Center charges $20 per adult and $10 per senior citizen for its performances. On a recent weekend evening when 560 people paid admission, the total receipts were $7,390. How many who paid were senior citizens?
A. 115 senior citizens
B. 282 senior citizens
C. 372 senior citizens
D. 205 senior citizens
Answer: C
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Solve the system of equations by Gaussian elimination. If there is an unlimited number of solutions, find two of them.-3x - y - 9z = -21 2x + 9y - 4z = 79 6x - 2y + z = -11
A. Inconsistent B. x = 1, y = 1, z = 9 C. Unlimited: x = 1, y = 9, z = 1, x = 1, y = 1, z = 9 D. x = 1, y = 9, z = 1
Multiply and simplify.(
+ 
)2
A. 7x + 2
+ y
B. 49x2 + 
+ y2
C. 49x2 + 2
+ y2
D. 7x + 
+ y
Perform the indicated operation without the use of a calculator and express each answer in decimal notation.
A. 29,400,000,000,000 B. 600,000 C. 29,400,000 D. 600,000,000,000
Find the probability.A class consists of 54 women and 88 men. If a student is randomly selected, what is the probability that the student is a woman?
A. 
B. 
C. 
D. 