Factor completely.x7 - 4x6y - 21x5y2
A. x5(x - 3y)(x + 7y)
B. x5(x + 7y)(x + 3y)
C. x4(x - 7y)(x + 3y)
D. x5(x - 7y)(x + 3y)
Answer: D
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The graph of a function f is given. Use the graph to answer the question. 
Find the numbers, if any, at which f has a local maximum. What are the local maxima?
A. f has a local minimum at x = 5 and 3.9; the local minimum at 5 is -8; the local minimum at 3.9 is 2.2 B. f has a local minimum at x = -8 and 2.2; the local minimum at -8 is 5; the local minimum at 2.2 is 3.9 C. f has a local maximum at x = 5 and 3.9; the local maximum at 5 is -8; the local maximum at 3.9 is 2.2 D. f has a local maximum at x = -8 and 2.2; the local maximum at -8 is 5; the local maximum at 2.2 is 3.9
Solve. Round to the nearest tenth if necessary.The enrollment at a local college increased 6% over last year's enrollment of 2300. What is the current enrollment?
A. 138 students B. 2438 students C. 2306 students D. 3680 students
Determine algebraically whether the function is even, odd, or neither.f(x) = 5x3 + 4
A. even B. odd C. neither
Simplify.
A. 
B. 3
C. 
D. 3x