Solve the system of equations using Cramer's Rule if it is applicable. If Cramer's Rule is not applicable, say so.
A. x = -2, y = 5; (-2, 5)
B. x = 5, y = -2; (5, -2)
C. x = 2, y = -5; (2, -5)
D. x = -5, y = -2; (-5, -2)
Answer: A
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Find a polar equation for the circle.x2 - 18x + y2 = 0
A. r = 18 sin ? B. r = -9 cos ? C. r = -18 sin ? D. r = 18 cos ?
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Solve the problem.The average cost per tape, in dollars, for a company to produce x sports videotapes is given by the functionA(x) = 
for x > 0
Graph the function on the interval (0, ?) and complete the following:A(x) ? 
as x ? ?.
A. 
A(x) ? 1 as x ? ?.
B. 
A(x) ? 0 as x ? ?.
C. 
A(x) ? 16 as x ? ?.
D. 
A(x) ? 11 as x ? ?.