The line x=8 is perpendicular to the radius and the horizontal distance from the center is 13.
The radius of this circle must be 13!
The circle then is (x+5)2 + (y-10)2 = 169
Blue B.
To get 13 for distance: you make graph and draw line x=8 and draw the center of (-5,10). The horizontal distance between the center and x=8 is 13 units. If you can see, since the center is (-5,10), this means that the radius, which extends to the line x=8 has to be equal to 13 units :)
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02/23/21
Faizah A.
Im sorry, but can you show how do you get 13 for distance?11/03/20