Solve.In preparation for his new job, Kevin bought two suits at $164 a piece, four shirts at $25 a piece, two pairs of shoes at $69 a piece, four ties at $21 a piece, and five pairs of socks at $7 a piece. What was the total cost of these items?
A. $699
B. $286
C. $650
D. $685
Answer: D
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The management of Acrosonic plans to market the ElectroStat, an electrostatic speaker system. The marketing department has determined that the demand for these speakers is 
, wherepdenotes the speaker's unit price (in dollars) andxdenotes the quantity demanded.
?
Acrosonic's production department estimates that the total cost (in dollars) incurred in manufacturing x ElectroStat speaker systems in the first year of production will be 
.
?
Find the profit function P and select the graph of the profit function.
?
A. ?
B. ?
C. ?
Use a graphing calculator to determine which of the following expressions asserts an identity.2 
= ...
A. 2 cosx + 2 sin x B. 2 cos 2x C. 2 D. 2 cos x - 2 sin x
Simplify.
A. - 
B. 
C. 
D. 
Use the discriminant to determine if the equation can be solved by factoring. If the equation can be solved by factoring, then factor it.d2 - 6d + 7 = 0
A. (d + 7)(d - 1) = 0 B. (d - 2.6)2 = 0 C. (d + 6)(d - 8) = 0 D. Cannot be solved by factoring