Answer:
Let's assume that the number of child tickets sold is "c" and the number of adult tickets sold is "a".
We can set up a system of two equations to represent the given information:
c + a = 145 (equation 1, the total number of tickets sold is 145)
6.2c + 9.6a = 1109.8 (equation 2, the total sales is $1109.80)
We can use equation 1 to solve for "a" in terms of "c":
a = 145 - c
Substitute this expression for "a" into equation 2 and solve for "c":
6.2c + 9.6(145 - c) = 1109.8
Simplifying the equation:
6.2c + 1392 - 9.6c = 1109.8
-3.4c = -282.2
c = 83
Therefore, 83 child tickets were sold on Thursday. We can find the number of adult tickets sold by substituting the value of "c" into the equation for "a":
a = 145 - c
a = 145 - 83
a = 62
Therefore, 62 adult tickets were sold on Thursday.