X- 3/7 = 4 what is x in simplest form

Which graph represents the following piecewise defined function?

Find the vertex of the function given below y=x^2-6x+1

Hell . what are the solutions to `10x^2 - 38x - 8 = 0`? is this when i find the factors and use the numbers within the factors to determine the zeros? i hope that made sense lol