SOLUTION: Julie gets a pre-paid cell phone. Initially she has a $40.00 balance on the phone. Each minute of talking costs $.15. Let x stand for the amount of time in minutes that Julie has

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Julie gets a pre-paid cell phone. Initially she has a $40.00 balance on the phone. Each minute of talking costs $.15. Let x stand for the amount of time in minutes that Julie has       Log On


   

Question 1143930: Julie gets a pre-paid cell phone. Initially she has a $40.00 balance on the phone. Each minute of talking costs $.15. Let x stand for the amount of time in minutes that Julie has talked on the phone, and let f(x) stand for the remaining dollar value of the phone.
Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(52914) About Me  (Show Source):
You can put this solution on YOUR website!
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Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
Problem is not well-described.

Initial ACCOUNT balance, $40.
Rate per minute, 0.15 dollars.
Balance, f(x);

highlight%28f%28x%29=-0.15x%2B40%29