Answer:
5 adult tickets
Explanation:
Let x be adult tickets and y be tickets for children under the age of 12.
We know the group of 8 people spent a total of 36.50 dollars, so we can create the following system of equations:
$5.5x + $3y = $36.5
x + y = 8
Now we can graph this system to help us answer the question.
-> See attached
-> The point at which the lines intersect answers our question. It means these values satisfy both equations.
The equations, when graphed, intersect at point (5, 3). In the beginning I said that x is adult tickets, so 5 adult tickets were sold.