Solve the logarithmic equation. Be sure to reject any value that is not in the domain of the original logarithmic expressions. Give the exact answer.log x + log (x +1) = log 90
A. {9}
B. 
C. {10, -9}
D. {10}
Answer: A
Mathematics
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Use the properties of logarithms to find the exact value of the expression. Do not use a calculator.log7 7-12
A. -84 B. 7 C. 1 D. -12
Mathematics
Solve and graph. Write the answer in set-builder notation.-6 ? 
A. {n |n ? -12}
B. {n |n > -12}
C. {n |n < -12}
D. {n |n ? -12}
Mathematics
Solve the rational inequality. Write the solution set in interval notation.
> 0
A. [-5, ?] B. (-5, -?) C. (5, ?) D. (-?, -5)
Mathematics
Factor out the negative of the greatest common factor. Assume any variable exponents represent whole numbers.-2x2 - 14x + 10
A. 2(x2 - 7x + 5) B. -2(x2 - 7x + 5) C. -2(x2 + 7x - 5) D. -2x(x2 + 7x - 5)
Mathematics