Answer:
8x + 5.50y = 78.50
Explanation:
Let Sally bought adult tickets = x
and children tickets = y
since, value of the adult tickets is $8.00 per ticket so total cost of x tickets = 8x
since value of children's tickets is $5.50 per ticket so total cost of y tickets = 5.50y
so total cost of the adult and children's tickets = 8x + 5.50y
Sally paid a total of $78.50. therefore, equation will be
8x + 5.50y = $78.50
Answer is 8x + 5.50y = $78.50