A cellular phone company offers a contract for whic the cost C, in dollars, of t minutes of telephoning is given by C =0.25 (t-500) + 59.95. where is it assumed that t≥500 minutes. What times will keep costs between $108.70 and $133.20?

Question

anonymous · Answer

plug the two separate values for (C)osts into the equation, solve for 't' and you will find your values for time.

anonymous · Answer

plug the 2 separate values for (C)osts into the equation, solve for 'T' and you will find your values for time.(:

anonymous · Answer

i couldn't have said it better myself...  : )

anonymous · Answer

I am not understanding

anonymous · Answer

lower value$$108.70 = 0.25(t-500) + 59.95$$ solve for t

anonymous · Answer

@lovejones2012,  does that move you in the right direction?