Answer:
9
Explanation:
Let x = # of movies Jamie watches in a month. 5 + 2.25x represents the monthly cost of Amazing Primo, and 15 + x represents the monthly cost of Netflakes.
5 + 2.25x > 15 + x
1.25x > 10
x > 8
Jamie must watch more than 8 movies each month for the Netflakes account to be cheaper overall.