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