Answer
They have to sell 250 cones to break even.
Work Step by Step
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.
