Perform the matrix operation. 
+ 
=
A. 
B. Not defined
C. 
D. 
Answer: B
Mathematics
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Find the area of the specified region.Inside the three-leaved rose r = 8 cos 3?
A. 32?
B. 8?
C. 16?
D. 
?
Mathematics
Solve the problem.Simple random sampling means that
A. all members of the population have an equal chance of being in the sample. B. any two groups of members of the population of equal size have the same chance of being in the sample. C. every member of the population is automatically a member of the sample. D. every member of the population has a chance of being in the sample. E. none of these
Mathematics
Determine whether or not the function is one-to-one.
A. No B. Yes
Mathematics
Use the imaginary unit to write the expression.
A. ±2
B. -2i
C. 2i
D. -i
Mathematics