The equation of a circle is x^2 + y^2 - 12x + 6y + 20 = 0. what is the radius of the circle?

Y< 2x-3 y? mx+3 which value of m and which symbol result in the system of inequalities shown above having no solution? a) m=-2; > b) m=-1/2; < c) m=2; > d) m=2;