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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Write an equation for the parabola with vertex at the origin.Focus (0, 3)
A. y = 
x2
B. y2 = 3x
C. y2 = 12x
D. y = 
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x
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Mathematics