Question

functions f an g defined as f(x)=2x-5 an g(x)=x[2]+3 what is f(4) gf(4) an the inverse of f (x)

Answer 1

f(4)=2(4)-5
=3

gf(4)=g(3)
=3(2)+3
=9

f(x)=2x-5 which is the same as y=2x-5 first step is to interchange the values x and y
x=2y-5 then we make y the subject of the formula
x+5=2y
(x+5)/2=y

Answer 2

thank you