Rationalize the denominator. Assume that all variables represent non-negative real numbers. Make sure you simplify the final answer.
A. 
B. 
C. 
D. 
Answer: C
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Solve the problem.Economists use what is called a Leffer curve to predict the government revenue for tax rates from 0% to 100%. Economists agree that the end points of the curve generate 0 revenue, but disagree on the tax rate that produces the maximum revenue. Suppose an economist produces this rational function 
where R is revenue in millions at a tax rate of x percent. Use a graphing calculator to graph the function. What tax rate produces the maximum revenue? What is the maximum revenue?
A. 28.8%; $272 million B. 27.0%; $379 million C. 30.9%; $382 million D. 38.4%; $383 million
Solve the problem.Determine whether the ordered triple (2, 8, -3) is a solution of the system of equations.3x - 4y - 2z = -204x + y - z = 19 x - 2y + 3z = -23
A. Yes B. No
Solve the equation.
x - 
= -6
A. {-19} B. {19} C. {17} D. {-17}
Refer to the table to answer the question. 
Which category and year represents the least change?
A. Catalog, 2008-2009 B. Catalog 2009-2010 C. Training 2008-2009 D. Sales, 2009-2010