Answer:
$ 11.5 can be spend on snacks.
Explanation:
Take the variable as 'x'.
Money with Carl = $ 20
Money he spends for ticket = $ 8.50
Money left with hin for snacks = x
20 - 8.50 = x -----> inequality
Solving,
20 - 8.50 = x
11.5 = x
Hope it helps ⚜