Lucy is deciding between two different movie streaming sites to subscribe to. Plan A costs $8 per month plus $2.50 per movie watched. Plan B costs $20 per month plus $1.50 per movie watched. Let AA represent the monthly cost of Plan A if Lucy watches xx per month, and let BB represent the monthly cost of Plan B if Lucy watches xx movies per month. Write an equation for each situation, in terms of x,x, and determine the interval of movies watched, x,x, for which Plan A is cheaper than Plan B.
