Simplify. (Assume all variables are nonzero.)
A. 12x4z5
B. 5x12z9
C. 5x4z5
D. 5x32z14
Answer: C
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A function f(x), a point x0, the limit of f(x) as x approaches x0, and a positive number ? is given. Find a number 
such that for all x, 0 < 
< ? ? 
< ?.f(x) = 3x - 10, L = -4, x0 = 2, and ? = 0.01
A. 0.005 B. 0.003333 C. 0.006667 D. 0.001667
Match the function f with its graph.f(x) = log2(x - 1)
A. 
B. 
C. 
D. 
Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. x - y + z - w = 10 -2x + 3y + 5w = -28x + 2y + 8z + 3w = -10 x - 4y - 6z - 5w = 30
A. {(-17w - 10, -13w - 16, 5w + 4, w)} B. {(3w - 2, -8w + 3, 4w + 9, w)} C. ? D. {(24, 10, -6, -2)}
Factor completely. If unfactorable, indicate that the polynomial is prime. x2 - 
x + 
A. 
B. prime
C. 
D. 
