Simplify the complex fraction.
A. 
B. 
C. k - 6
D. 
Answer: A
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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. 36.6%; $268 million B. 35.8%; $276 million C. 41.2%; $264 million D. 34.0%; $271 million
Provide an appropriate response.True or false? If r is an x-intercept of the graph of y = f(x), then 
has an x-intercept at x = -r.
A. True B. False
Find the slope of the line through the given points.(5, -3), (-2, -6)
A. m = 
B. m = 
C. m = 
D. m = 2
Solve the problem.If f(x) = 5x + 15 and g(x) = 4x - 1, find f(g(x)).
A. 20x + 14 B. 20x + 59 C. 20x + 20 D. 20x + 10