I guess you're looking for
m=the number of minutes
Hi i'm having a bit of a brain freeze here and need help with this problem.
ok so, Company A charges $30 per month and $0.20 per minute for phone calls , whereas Company B charges $20 per month and $0.25 per minute. how do i determine a formula for the phonebill form company A and company B as a function of the number of minutes that you talk per month?
any help would be awesome!