Solve the logarithmic equation.log (4 + x) - log (x - 3) = log 2
A. 
B. {10}
C. ?
D. {-10}
Answer: B
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Find the sum.
A. 109,890 B. 54,945 C. 59,319 D. 55,026
Compute the result. Leave your answer in scientific notation. Round your answer to 1 decimal place.
?
?
A. 
B. 
C. 
D. 
E. ?
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. 31.4%; $464 million B. 26.5%; $469 million C. 29.7%; $467 million D. 28.1%; $470 million
Give all solutions of the nonlinear system of equations, including those with nonreal complex components.x2 + 3xy + y2 = 4 x2 - 3xy - y2 = 4
A. {(2, -6), (-2, 6)} B. {(2, 0), (-2, 0)} C. {(2, 0), (-2, 0), (2, -6), (-2, 6)} D. {(0, 2), (0, -2), (2, -6), (-2, 6)}