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Anyone knows the answer?

Anyone knows the answer?-example-1
User Knock Yang
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1 Answer

1 vote

Answer:

D) (2,-1)

Explanation:

These are two concentric circles of radius 3 and 4 at the origin. That means that any point within the inner is also within the outer. So focusing on the inner, the points plugged into its equation must be less than or equal to the radius squared or 9. That is only valid with point D.

User Sheila
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