Evie's cell phone plan cost $35 a month with an additional 10 cents per minute for any minutes over 500 minutes per month. Evie was charged $37.20 in January, how many minutes did Evie use on her cell phone plan that month?

Question

Julia Adams · Accepted Answer

#522# minutes

The difference between $35 and the charge is made up by the minutes more than 500. #$37.20 -$35 = $2.20# #$2.20 = 220 # cents #220 div 10 = 22# extra minutes Evie used #500+22 = 522# minutes on her phone plan

Avery Alexander · Answer

undefined To find out how many minutes Evie used on her cell phone plan in January, we need to solve the following equation:

$$ 35 + 0.10 \times (x - 500) = 37.20 $$

Where:
- $ x $ represents the total number of minutes Evie used in January.

First, subtract the fixed monthly cost from the total amount charged to find the additional cost due to extra minutes:

$$ 37.20 - 35 = 2.20 $$

Then, divide this additional cost by the per-minute rate to find the number of extra minutes:

$$ 2.20 / 0.10 = 22 $$

Finally, add these extra minutes to the 500 base minutes to find the total number of minutes used:

$$ 500 + 22 = 522 $$

Therefore, Evie used 522 minutes on her cell phone plan in January.