Respuesta :

Answer: radius = 4

Step-by-step explanation:

The equation of circle is [tex](x - h)^{2} +(y - k)^{2} =r^{2}[/tex]

So [tex]3((x-5)^{2}+ (y+9)^{2} )=48[/tex]

[tex](x-5)^{2}+(y+9)^{2}=16[/tex]

So [tex]r^{2} = 16[/tex]

[tex]r=4[/tex]

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