Identify the row operation that produces the resulting matrix.
? 
A. (-1)R2 ? R2
B. R1 + (-1)R2 ? R2
C. (-1)R1 + R2 ? R2
D. R1 + (-1)R2 ? R1
Answer: B
Mathematics
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sin(4?) = 3
A. 
B. {0}
C. 
D. 
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?
?
A. 
B. 
C. 
D. 
E. 
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