Question

If F(x) = 5x + 4, which of the following is the inverse of F(x)?

A. F-1(x) = 4 – 5x

B. F-1(x) = x-4/5

C. F-1(x) = 5x – 4

D. F-1(x) = x-5/4

Answer 1

\[f(x)=5x+4\]\[Let~y=5x+4\]\[y-4=5x\]\[\frac{ y-4 }{ 5 }=x\]\[f^{-1}(x)=\frac{ y-4 }{ 5 }\]\[Therefore,f^{-1}(x)=\frac{ x-4 }{ 5 }\]

Answer 2

which option do u think is correct? @ShyannaD

Answer 3

A

Answer 4

B

Answer 5

yes :)