Notes Given that f(ac) = a2 - 13x and g(ac) = ac + 9, find ( a) f+ 9= (b) f - g = (c) fg = (d) Use the following functions to: find, simplify, and identify the domain of each of the function combinations. f(a) = 22 - 9x and g(x) = x+5 (a) (f + g) (a) = Domain of (f + g) (x) : (b) (f - g) (ac) = Domain of (f - g) (2) : (c) (fg)(a) : Domain of (fg) (a) : (d) ( ) (2) - Domain of (ac)