Simplify the expression. Assume that all variables represent non-negative real numbers.12
- 5x
- 
A. 7x
- x2
B. 12x3
- 5x
- x2
C. -13x
- x2
D. -13x
- x3
Answer: C
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Write an equation for the parabola.
A. (y - 2)2 = -12(x + 3) B. (x - 3)2 = -12(y + 2) C. (x - 2)2 = -12(y + 3) D. (x + 3)2 = 12(y - 2)
Each matrix is nonsingular. Find the inverse of the matrix. Be sure to check your answer.
A. 
B. 
C. 
D. 
Write the following as a rate in lowest terms.25 printers for 10 computers
A. 
B. 
C. 
D. 
Solve the problem.A product sells by word of mouth. The company that produces the product has noticed that revenue from sales is given by 
where x is the number of units produced and sold. If the revenue keeps changing at a rate of 
per month, how fast is the rate of sales changing when 800 units have been made and sold? (Round to the nearest dollar per month.)
A. $2263/month B. $113,137/month C. $4525/month D. $6/month