5\7m-2-6\7m=-13 what is the answer

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

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

Ineed with angles and the measure of them i have abc a is 65 and b is (3x-10) and c is (2x) find the value of x