math
posted by Jay on .
If the rental fee on a land line phone is $45 per month and $0 per month for a cell, and the cell cost 85 cents a minute and the land line cost 15 cents a minute, with calls for one month on both phones totaling 1 hr and 5 mins,show how the land line phone cost less than using a cell.

Figure out the cost for the minutes then compare the two. The cell is .85 per minute times 65 minutes. The land line is .15 per minute times 65 minutes plus the $45 monthly fee for the total cost.