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# coordinates

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There are four points that are 5 units from the line y=13 and 18 units from the point (7,15). What is the sum of the x and y and coordinates of all four of these points?

May 16, 2021

#1
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Point:=$(a,b)$. Then $b=13\pm 5$.

If $b=18$: $(a,18)\to (7,15)=18$. So $(a-7)^2=18^2-9$. Finish from here

If $b=8$: Same thing

May 16, 2021