Find the exact value of the expression.cos (60° - 45°)
A. 
B. 
C. 
D. 
Answer: D
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The proprietor of the Showplace, a video store, has estimated that the rental price p (in dollars) of prerecorded video discs is related to the quantity x rented/day by the demand equation
?
?
Currently, the rental price is $3/disc. Is the demand elastic or inelastic at this rental price? If the rental price is increased, will the revenue increase or decrease?
?
A. inelastic, increase B. inelastic, decrease C. elastic, decrease D. elastic, increase
Simplify the expression.(-7x6y4z)2
A. 49x12y8z2 B. -49x12y8z2 C. 14x12y8z2 D. -7x8y6z
Add or subtract, if possible. Assume that all variables represent non-negative values. Simplify your answer. -2
+ 5
- 
- 5
A. 21
+ 5
B. -21
+ 5
C. 21
- 5
D. -21
- 5
Use the quadratic formula to solve the equation. Simplify any radicals.4x2 - x + 3 = 0
A. 
B. {1 ± 
}
C. 
D. ?