Simplify the expression.
A. sin x
B. -sin x
C. -cos x
D. cos x
Answer: C
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Solve the problem.When you buy an item on which sales tax is charged, the total cost is calculated by the formula: 
where T is the total cost, P is the item's price, and S is the sales tax rate (as a percent). If you pay $14.77 for an item priced at $14, what was the tax rate?
A. 6.5% B. 5.5% C. 2.75% D. 7.5%
Multiply and simplify.
? 
A. 1
B. 
C. -1
D. 0
Find (if possible) the complement of 
.
A. 
B. 
C. 
D. ?
E. not possible
Use the graph of y = P(x) to do the following: (i) Find the x-intercepts; (ii) Solve the equation P(x) = 0; (iii) Find the zeros of P(x).
A. (i) -5, -8; (ii) -5, -8; (iii) -5, -8 B. (i) -5, 8; (ii) -5, 8; (iii) -5, 8 C. (i) -8, 5; (ii) 5, 8; (iii) -8, 5 D. (i) 5, 8; (ii) 5, 8; (iii) 5, 8