SOLUTION: Keisha purchased a prepaid phone card for $20.Long distance calls cost 21 cents a minute using this card. Keisha used her card only once to make a long distance call. If the rema

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Keisha purchased a prepaid phone card for $20.Long distance calls cost 21 cents a minute using this card. Keisha used her card only once to make a long distance call. If the rema      Log On


   

Question 1099696: Keisha purchased a prepaid phone card for
$20.Long distance calls cost 21 cents a minute using this card. Keisha used her card only once to make a long distance call. If the remaining credit on her card is $17.48,how many minutes did her call last?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
First find the cost of her one call.
T=20-17.48
T=2.52
Then find the number of minutes using this cost.
M=2.52%2F0.21
Work that out for the answer in minutes.