Rationalize the denominator. If any variables are present, assume that they represent nonnegative numbers, and assume that the denominator is not zero.
A. 
B. 
C. 
D. 
Answer: B
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Solve by the method of elimination by substitution. x + 9y = 62-4x + 9y = 67
A. x = -1, y = 7 B. x = 1, y = 6 C. x = 0, y = 6 D. Inconsistent
Evaluate.9-1/2
A. 
B. 6
C. 
D. 3
Use the maximum/minimum finder on a graphing calculator to determine the approximate location of all local extrema.f(x) = 0.01x5 - x4 + x3 + 8x2 - 7x - 66
A. Approximate local maxima at -1.861 and 2.247; approximate local minimum at 0.423 B. Approximate local maxima at -1.83 and 2.327; approximate local minima at 0.413 and 79.161 C. Approximate local maxima at -1.861 and 2.247; approximate local minima at 0.423 and 79.192 D. Approximate local maxima at -1.947 and 2.296; approximate local minima at 0.358 and 79.241
Write an expression or equation representing the following and simplify if possible.9 less than the square of z.
A. 9 - z2 B. (z - 9)2 = z2 - 18z + 81 C. z2 - 9 D. (z + 9)2 = z2 + 18z - 81