Solve the following system of linear inequalities by graphing.3x - y ? 6x + 4y ? 8
A. 
B. 
C. 
D. 
Answer: D
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Solve the problem.An arch for a bridge over a highway is in the form of a semiellipse. The top of the arch is 30 feet above ground (the major axis). What should the span of the bridge be (the length of its minor axis) if the height 27 feet from the center is to be 10 feet above ground?
A. 28.64 ft B. 162 ft C. 57.28 ft D. 45.88 ft
Change the order of integration and evaluate the integral.
A. 
?
B. 
?
C. 
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D. 
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Solve.If y varies directly as x and y = 168 when x = 14, what is the value of y when x = 16?
A. 144 B. 192 C. 196 D. 256
Use properties of logarithms to expand the logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator.log6
A. log6(x - 4) - 4log6x B. log6(x - 4) -log6x C. log6(x - 4) + 4log6x D. 4log6x -log6(x - 4)