given f(x)=3x-5 , evaluate each of the following f(4) F(x+2) f(-x)

f(4) = 3 * 4 - 5 = 12 - 5 = 7

f(x+2) = 3 * ( x + 2 ) - 5 = 3x + 6 - 5 = 3x +1

f(-x) = 3 * ( - x ) - 5 = -3 x -5