If f(x)=-x2+6x-1 and g(x)=3x^2-4x-1, find (f-g)(x)

If given an equation of a line such as -1/2x+6 how would you create an equation of a line parallel and perpendicula to this line that goes through another point such as (4,10)

What are the values of each variable in the diagram below?

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585