Please help meee I’m begging someone to please help it’s for a grade I’m not sure if I’m right and I don’t get it

For the given quadratic equation convert into vertex form, find the vertex and find the value for x=6 y=-2x^2+2x+2

Find the equation of a line whose slope is 2/5 and y- intercept is 2.write your answer in the form 1) ax+by+c=02) x/a+y/b=1

Which of the following shows the length of the third side, in inches, of the triangle below