Answer:
f(13)=2x-1, x=7
Step-by-step explanation:
7*2=14, 14-1=13
vise versa
f(13)=2(7)-1
Answer: 25
Step-by-step explanation: Easy. Just substitute 13 for x into the equation. f(13)=2(13)-1
= 26-1
= 25
