<h2>
Answer:</h2>
The number of friends who purchased ride passes= 6
<h2>
Step-by-step explanation:</h2>
It is given that:
A fair charges $7.25 for admission and $5.50 for a ride pass.
Now, if 10 friends visited the fair.
This means that:
Total cost of admission= 7.25×10= $ 72.5
Also, if x friends purchased the ride passes.
Then, the total cost of ride passes= 5.50x
Total cost= 72.5+5.50x
This means that:
72.5+5.50x=105.50
i.e.
5.50x=105.50-72.5
5.50x=33
x=33/5.50
x=6
Hence, 6 friends purchased ride passes.
