Evaluate the expression for the given replacement values.8x - 4y for x = 9 and y = 3
A. 68
B. 69
C. 60
D. 84
Answer: C
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Determine the limit by sketching an appropriate graph. 
A. 4 B. -0 C. Does not exist D. -12
Solve the problem.To approximate the velocity of a river, a circular paddle wheel with radius 0.43 feet is lowered into the water. If the current causes the wheel to rotate at a velocity of 14 revolutions per minute, what is the velocity of the current? Express the answer in miles per hour rounded to two decimal places if needed.
A. 37.82 miles per hour B. 0.43 miles per hour C. 0.07 miles per hour D. 0.21 miles per hour
Factor the polynomial completely.x3 - 125
A. (x + 5)(x2 - 5x + 25) B. (x - 5)(x2 + 25) C. (x + 125)(x2 - 1) D. (x - 5)(x2 + 5x + 25)
Give the equation of the horizontal asymptote of the rational function.g(x) = 
A. y = 1 B. y = 0 C. x = 1 D. y = 6