Answer:
The cost of small soft drink is $2.50.
Step-by-step explanation:
Cost of 1 medium popcorn = $4.40
Cost of 1 small of drink =x
Cost of 1 movie ticket = $9
Cost of 2 medium popcorn =2 × $4.40 = $8.80
Cost of 1 soft drink =1 × x =x
Cost of 2 movie tickets = 2 × $9 = $18
Amount of gift certificate, A = $10
Total amount of bill ,T= $19.30
T = $8.80 + x + $18 - A
$19.30 = $8.80 + x + $18 - $10
x = $19.30 - $8.80 - $18 + $10
x = $2.50
The cost of small soft drink is $2.50.