SOLUTION: Cindy's cell phone company charges $0.20 for each minute of a call. If she was charged a total of $14.40 for calls in the month of July, how many minutes had she used the phone tha

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Question 156795: Cindy's cell phone company charges $0.20 for each minute of a call. If she was charged a total of $14.40 for calls in the month of July, how many minutes had she used the phone that month?
Found 2 solutions by jojo14344, edjones:
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!
Remember:
Let X=minutes, and
Charge=%28Rate%29%28Minutes%29, where Rate=0.20%2Fminute
Then,
14.40=%280.20%2Fminute%29%28X%29
cross%2814.40%2972%2Fcross%280.20%29=cross%280.20%29X%2Fcross%280.20%29
X=72Minutes --------------> minutes used that month
*Note: if you multiply 72Minutes by rate+=0.20%2Fminute that equals to $14.40.
Thank you,
Jojo

Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
14.40/.20=72 min