Use the unit circle to find the value of the trigonometric function.tan 
A. 
B. 
C. 
D. 1
Answer: A
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You are on a shopping trip. The store will round the amount you pay for each item to the nearest cent. Find the amount you will pay.Printer ribbons are 6 ribbons for $18.83, so one ribbon is $3.1383. You pay:
A. $3.24 B. $3.14 C. $3.13 D. $3.138
Solve the equation.
= 
A. {
, 
}
B. {- 
, - 
}
C. {
, - 
}
D. ?
Convert the constraints into linear equations by using slack variables.Maximize z = 3x1 + 5x2Subject to: 9x1 + 3x2 ? 30 x1 + 6x2 ? 40 x1 ? 0, x2 ? 0
A. 9x1 + 3x2 + s1 ? 30 x1 + 6x2 + s2 ? 40 B. 9x1 + 3x2 + s1 ? 30 x1 + 6x2 + s2 ? 40 C. 9x1 + 3x2 = s1 + 30 x1 + 6x2 = s2 + 40 D. 9x1 + 3x2 + s1 = 30 x1 + 6x2 + s2 = 40
Solve the problem.The Family Arts Center charges $20 for adults, $15 for senior citizens, and $10 for children under 12 for their live performances on Sunday afternoon. This past Sunday, the paid revenue was 
for 685 tickets sold. There were 45 more children than adults. How many children attended?
A. 246 children B. 211 children C. 218 children D. 365 children