Answer:
Jose can invite 16 friends.
Explanation:
For roller skating, the skate rentals charge $2.50 per person.
Jose has to invite friends and wants to spend a total of $50.
$50 / $2.50 = 20
So, for $50.00, 20 people can enjoy roller skating.
Out of these 20 people, one will he Jose himself and 3 will be the adult chaperones.
20 - 4 = 16
Therefore, Jose can invite 16 friends for roller skating.