What is element 
of the inverse of the following matrix?
?
?
A. 
?
B. 
?
C. - 
?
D. - 
?
E. 
?
Answer: E
Mathematics
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Find the unknown length in the right triangle. Give an exact answer.
A. b = 7
B. b = 
C. b = 7
D. b = 
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Add or subtract. Simplify the answer.
+ 
A. 
B. 
C. 
D. 
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Subtract. Simplify, if possible.11
- 
A. 10
B. 11
C. 10
D. 9
Mathematics
Plot the complex number and find its absolute value. ? -5 + 9i ?
A. ?
?
|-5 + 9i| = 
B. ?
?
|-5 + 9i| = 
C. ?
?
|-5 + 9i| = 
D. ?
?
|-5 + 9i| = 
E. ?
?
|-5 + 9i| = 
Mathematics