Whats the length in the picture

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = -6. which function could heather be writing? fx) = x2 + 36x + 12 = x2 - 36x - 12 f(x) = -x + 12x + 36 f(x) = -x? - 12x - 36

Which of the following circles have their centers on the x-axis? check all that apply.

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =