Simplify the complex fraction.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve the problem.In a survey, people are asked to rank 6 issues such as the economy and the environment in order of importance. Replies are filed in folders, and two replies are put in the same folder if and only if they give the same ranking to all 6 issues. Find the maximum number of folders that might be needed.
A. 720 B. 6 C. 5040 D. 36
Mathematics
Find sum of the pair of complex numbers.-4i, -8
A. -8 + 4i B. -8 - 4i C. -12i D. -4 - 8i
Mathematics
sketch the graph of the function
a.
b.
c.
d.
Mathematics
Solve the equation.
- 7 = x
A. 
B. 
C. - 
D. - 
Mathematics