Andrew has a cell phone plan that provides 300 free minutes each month for a flat rate of $19. for any minutes over 300, andrew is charged $.39 per minute. which of the following piecewise functions represent charges based on andrew's cell phone plan?

I need to know more of the information. it gives half of the question not the full question and with out the whole this I can not answer it. sorry.

Answerthe simplified expression isexplanationthe given expression is,let us deal with the bracket first.the two negatives in the parenthesis will become positive.the expression now becomes,we now expand the parenthesis to get,we group like terms to obtain,this simplifies to,