Simplify.
A. 9
B. 27
C. 3
D. 3
Answer: C
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Solve using a system of linear equations in three variables.The Family Arts Center charges $23 for adults, $18 for senior citizens, and $9 for children under 12 for their live performances on Sunday afternoon. This past Sunday, the paid revenue was 
for 874 tickets sold. There were 42 more children than adults. How many children attended?
A. 240 children B. 458 children C. 328 children D. 296 children
Use various trigonometric identities to simplify the expression then integrate.
cos 5? d?
A. 
sin 5? - 
sin 3? - 
sin 7? + C
B. 
sin 5? - 
sin 7? - 
sin 3? + C
C. 
sin 3? - 
sin 5? - 
sin 7? + C
D. 
sin 5? - 
sin 3? - 
sin 7? + C
Provide an appropriate response.If a = 7, b = 11, and c = 13.04, express tan A as a decimal to the nearest ten-thousandth.
A. 1.5714 B. 1.1855 C. 0.5368 D. 0.6364
Use the given graph of f(x) = ax2 + bx + c to solve the specified inequality.f(x) > 0
A. all real numbers B. x > 9 C. x = 0 D. no solution