Add or subtract.
+ 
A. m + 4
B. 
C. m - 4
D. m - 2
Answer: C
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Use a half-angle formula to find the exact value of the expression.sin 165°
A. 
B. - 
C. - 
D. 
Multiply.(-3y - 2)(-6y2 - y + 7)
A. 18y3 - 19y - 14 B. -3y2 - 19y - 14 C. 18y3 + 15y2 - 19y - 14 D. 18y3 + 9y2 - 19y - 14
Solve the problem. Give the answer to the nearest thousandth if necessary.Below is a diagram of a water slide. The slide is 28 ft long. The ladder leading to the slide is 
long. How far is it from the end of the slide to the foot of the ladder?
A. 6.305 ft B. 12.610 ft C. 79.500 ft D. 26.500 ft
Solve the problem.An art teacher knows that for a price of $20 per student, she can enroll 40 students in her pottery class. However, for each decrease of $2 in the price, she can expect 10 more students. What price will maximize her revenue from the class?
A. $8 B. $17 C. $14 D. $26