## Algebra 1: Common Core (15th Edition)

Let x = the number of cones sold y = total cost/income The total cost: $y=0.45x+200$ The total income: $y=1.25x$ Substitute the first equation: $1.25x=0.45x+200$ Simplify: $0.8x=200$ $x=250$ They have to sell 250 cones to break even.