Add or subtract as indicated. Make sure that your answer is reasonable by estimating first.9.960 + 5.092
A. 4.868
B. 15.052
C. -4.868
D. 16.052
Answer: B
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Solve 9 + 16x2 -24x = 0 by factoring.
a. 
b. 
c. x = -3, 4
d. 
e. x = -4, 3
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. 39.6%; $209 million B. 37.5%; $210 million C. 34.9%; $207 million D. 35.8%; $209 million
Evaluate the square root. If it is not a real number, say so.
A. Not a real number B. 18 C. 16 D. 32
Solve the problem.Two angles are supplementary. One angle is 40° more than three times the other. Find the measure of each angle.
A. 43°, 137° B. 35°, 145° C. 40°, 140° D. 38°, 142°