Posted by Liz on Tuesday, October 4, 2011 at 8:19pm.
The revenue R from selling x number of phone widgets is given by , and the cost C of producing those widgets is given by . Find the number of widget it requires to break even.

Math  drwls, Tuesday, October 4, 2011 at 8:24pm
You seem to have omitted two important formulas that follow the "is given by" phrases.
Math is about numbers. You need to provide them, and ask a complete question.