Answer:
Final answer is c) 8
Step-by-step explanation:
GIven equation is [tex]f(x)=\frac{x+7}{5}[/tex]
Now we need to evaluate [tex]f^{-1}(3)[/tex].
[tex]f^{-1}(3)[/tex] means find the value of x for which y of f(x)=3
[tex]f(x)=\frac{x+7}{5}[/tex]
[tex]3=\frac{x+7}{5}[/tex]
[tex]3*5=\frac{x+7}{5}*5[/tex]
[tex]15=x+7[/tex]
[tex]15-7=x[/tex]
[tex]8=x[/tex]
Hence final answer is c) 8
