Answer:
The total cost of an adult tickets and k kids tickets would give us the equation, (13.50 x a) + (7 x k)= total price.
In order to solve how much it is for the adult and children tickets we must multiply. The price times the number of people buying tickets.
13.50 x 8= 108 = adult prices
7 x 16= 112 = children prices
This means the total cost for 8 adult tickets is 108 dollars and the total cost for 16 kids tickets is 112 dollars.
This also means that the cost for a adult tickets is (13.50 x a) and the total cost of k kids tickets is (7 x k)
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I hope this helped & Good Luck <3!!!