9- $3 because 12 divided by 4.
10- 6 because 36 divided by 6
11- -7 because -8-20= -28 -28 divided by 4r is -7
12 is -2 because 10-16 is -6 divided by 3z is -2
13- $7 per ticket
14- 3x+5=26 3x because that's the amount of people going. 5 the price of the popcorn. 26 the total of everything. 26-5=21 21 divided by 3 is 7
15- D