Relative to the circle with the equation x^2 + y^2 = 4, how has the circle with the equation (x+5)^2 + (y-6)^2 =4 been shifted? What is the radius of the circle?

1.what effect does replacing x with x−4 have on the graph for the function f(x) ? f(x)=|x−6|+2 the graph is shifted 4 units up. the graph is shifted 4 units down. the graph is shifted 4 units left. the graph is shifted 4 units right. 2.what are the coordinates of the hole in the graph of the function f(x) ? f(x)=x^2+3x−28/x+7 3.which graph represents the function?