Simplify the complex number and write it in standard form.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Answer: C
Mathematics
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Solve the problem.In how many ways can a group of 7 students be selected from 8 students?
A. 56 B. 7 C. 1 D. 8
Mathematics
Multiply.(2x + 11)(2x - 11)
A. 2x2 - 44x - 121 B. 4x2 - 44x - 121 C. 4x2 + 44x - 121 D. 4x2 - 121
Mathematics
Use the quotient rule to simplify.
A. x2y
B. xy
C. xy2
D. xy2
Mathematics
Find the exact value of the expression.cos 
cos 
+ sin 
sin 
A. 
B. 
C. 
D. 1
Mathematics