Find the domain of the function.f(x) = 
+ 
A. (-?, -1) ? (-1, ?)
B. (-?, 9) ? (9, ?)
C. (-?, -1) ? (-1, 9) ? (9, ?)
D. (-?, ?)
Answer: C
Mathematics
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Rewrite the expression with a positive rational exponent. Simplify, if possible.(9xy)-2/10
A. 
B. 
C. 
D. - 
Mathematics
Solve the equation.8 = z + 2
A. {-10} B. {10} C. {6} D. {-6}
Mathematics
Write the number in simplest form, without a negative radicand.2 + 
A. 2 - 5i B. -3 C. 2 + 5i D. 2 + i
Mathematics
Solve the problem.A sequence has a1 = 5, and each term is found by adding 4 to the preceding term. Find the general nth term and the 40th partial sum of the series.
A. an = 9 + 4n S40 = 9 B. an = 5 + 4n S40 = 3400 C. an = 1 + 4n S40 = 3320 D. an = 1 + 4n S40 = 6640
Mathematics