Find the solution set for the system by graphing both of the system's equations in the same rectangular coordinate system and finding points of intersection.4x2 + y2 = 4 y2 - 4x2 = 4 
A. {(0, -2), (0, 2)}
B. {(0, 4)}
C. {(2, 0), (2, 0)}
D. {(0, -2)}
Answer: A
Mathematics
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Find the marginal average profit function.
A. 
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B. 
hundreds of dollars per item
C. 
hundreds of dollars per item
D. 
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Mathematics