Simplify. Assume variables represent nonnegative values.

A. 3x2
B. 3x
C. 3xy
D. 3xy2

Answer: B

Mathematics

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Find the root. Assume that variables represent any real number.

A.
B. (z - 7)2
C.  - 7
D.  - 7

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Simplify the expression.9x + 2(x - 7)

A. 18x - 5 B. 11x + 14 C. 10x - 14 D. 11x - 14

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Solve by the quadratic formula. If there are no real roots, say so.12x2 = 4x - 8

A. x = -  ± 
B. x =  ± 
C.
D. No real solution

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Use one of De Morgan's laws to write the negation of the statement.2 < 9 or 7 ? 6

A. 2 < 9 or 7 = 6 B. 2 ? 9 or 7 ? 6 C. 2 ? 9 and 7 = 6 D. 2 ? 9 or 7 = 6

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