Solve the system by the addition method.x2 + y2 - 4x + 8y + 19 = 0 x2 - y2 - 4x - 8y - 13 = 0
A. {(3, -4), (-1, -4)}
B. {(3, -4), (1, -4)}
C. {(2, 3), (2, 5)}
D. {(2, -3), (2, -5)}
Answer: B
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A. 9
B. - 
C. - 
D. - 
Write fractions to represent the shaded and unshaded portions of the figure.
A. 
, 
B. 
, 
C. 
, 
D. 
, 