Use the order of operations to simplify the expression.
÷ 
- 
? 
A. 2
B. 3
C. 
D. 2
Answer: D
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Solve the problem.The demand for a rooftop-mounted industrial air conditioner is given by the demand function D(x) = 
where x is the number of units produced each day and D(x) is the number sold each day. Assume that x is an integer. What is the domain of the demand function from a purely mathematical point of view?
A. All integers B. All integers other than -3 or 0 C. All integers other than 3 or 0 D. All integers greater than 0
Which of the following is a factor of the expression 
?
??
A. x2- 2 B. x2- 3 C. x2 + 3 D. x4- 2
Solve the formula for the specified variable.S = 2?rh + 2?r2 for h
A. h = 2?(S - r)
B. h = 
C. h = 
- 1
D. h = hS - r
Solve the problem.The numerator of a fraction is 9 times the denominator. If 1 is subtracted from the numerator, and added to the denominator, the resulting fraction is equal to 
. Find the original fraction.
A. 
B. 
C. 
D. 