Let c = # of children who bought a ticket // Let a = # of adults who bought a ticket
Since the theater company charges $8.50 for all age groups, it isn't necessary to have two different variables. The expressions that you could use are:
8.5(a + c)
8.5a + 8.5c
They both equate to the same thing, just two different ways of writing it. I hope this helps!
