Evaluate.

A. -2
B. -15
C. -8
D. 8


Answer: D

Mathematics

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Write as a single logarithm.log10 x + log10 4

A. log10 (x + 4)
B. log10 
C. log10 4x
D. (log10 x)(log10 4)

Mathematics

Solve the equation by completing the square.x2 - 4x + 1 = 0

A. {2 + , 2 - }
B. {-2 + }
C. {-2 + , -2 - }
D. {2 + }

Mathematics

Factor by grouping.2x + 16 + xy + 8y

A. (x + 8y)(2 + y) B. (x + 8)(2 + y) C. (y + 8)(x + 2) D. (y + 8)(2x + y)

Mathematics

Simplify the expression. Write the answer using positive exponents.

A. (x + e)7
B.
C.
D. x + e

Mathematics