-2= 5x+ 3? what is the answer help

Need ! discuss how to convert the standard form of the equation of a circle to the general form. 50 points

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle