Help please. im doing a test

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle