For the function f(x) = x2 ­ -12, find (f o f­-1)(4)

Which of the following equations is of the parabola whose vertex is at (4, 3), axis of symmetry parallel to the y-axis and focus at (4, -3)? a.) y+3=1/24 (x+4)^2 b.)y-3=-1/24 (x-4)^2 c.)x-4=-1/24 (y-3)^2

Can you me find the missing length. i attached an image.

Which of the following is not a subset of {1,2,3}?