Combine like terms.
m3n2 - 
mn - 
m3n2 - 
mn
A. - 
m3n2 - 
mn
B. 
m3n2 + 
mn
C. 
m3n2 + 
mn
D. - 
m3n2 - 
mn
Answer: D
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Solve.Dave's movie collection, consisting of VHS tapes and DVDs, are arranged on a storage shelf that is 36 inches in length. The VHS tapes are 1.25 inches thick, and the DVDs have a thickness of 0.5 inch. If 51 of his movies exactly fit on the storage shelf, how many of the movies are DVDs?
A. 37 DVDs B. 24 DVDs C. 14 DVDs D. 34 DVDs
The graph of a function is given. Determine whether the function is increasing, decreasing, or constant on the given interval.(-3, 0)
A. increasing B. constant C. decreasing
Rewrite the given expression as a single logarithm. Assume that all variables are defined in such a way that variable expressions are positive and bases are positive numbers not equal to 1.logx 28 - logx 7
A. logx 21
B. 
C. logx 196
D. logx 4
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. 35.8%; $276 million B. 41.2%; $264 million C. 34.0%; $271 million D. 36.6%; $268 million