To find out how much each friend should pay, you need to divide the total bill by the number of friends.
The total bill is $85 and there are 9 friends.
\[ \text{Amount each friend pays} = \frac{\text{Total Bill}}{\text{Number of Friends}} = \frac{85}{9} \approx 9.44 \]
So, each friend should pay approximately $9.44.