SOLUTION: Nichole's cellphone company charges a base price of $20.00 for 100 minutes and $0.10 per minute over 100 minutes. If the amount of her bill is $50.00 during one month, how many min

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Nichole's cellphone company charges a base price of $20.00 for 100 minutes and $0.10 per minute over 100 minutes. If the amount of her bill is $50.00 during one month, how many min      Log On


   

Question 629344: Nichole's cellphone company charges a base price of $20.00 for 100 minutes and $0.10 per minute over 100 minutes. If the amount of her bill is $50.00 during one month, how many minutes did she use?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
50=.1(x-100)+20
30=.1x-.1*100
30=.1x-10
40=x/10
400=x She used 400 minutes
check
50=(400-100)/10+20
30=300/10
30=30
ok