Math Journal

March 23,2009

Problem:
T-mobile charges $34.99 a month for phone service. They also charge $0.48 per minute for long distance calls. If Joshua's bill was $64.75, how many minutes of long distance calls did she make?

Part A - Write an equation that can be used to solve the problem.

Equation: 0.48m+34.99=64.75
M=62

The way I received my answer was first, I made an equation which was 0.48m+34.99=64.75. To solve what m was, I had to work backwards so I had to subtract 34.99 from 34.99. That canceled it self out so i did it to the other side of the problem. The equation became 0.48m=29.76. Next, I was still had to work backwards and I divided 0.48 by 0.48. That canceled it self out so I did it to the other side. 0.48 divided by 29.76. That gave me 62. This told me that m=62. That Joshua used 62 minutes of long distance calling. This is how I received my answer of 62.