Question

Jim pays $75 per month for a cell phone plan plus $0.30 per minute beyond the first 1000 minutes. His bill was $105.60 last month. How many minutes did he use?

Answer 1

Since $75 is constant for every month,
The cost minutes used beyond the first 1000 minutes will be 105.6 - 75 = 30.6$

Rate per extra minute is $0.30
So the number of extra minutes is 30.6 / 0.3 = 102

So total number of minutes he used is 1000 + 102 = 1102 minutes.

Answer 2

Answer:

1102 minutes

My Explanation:

Let x be the number of minutes Jim used

105.60=75+0.30(x-1000)

105.60 =75+0.30x−300

105.60=0.30x−225

1056=3x−2250

1056+2250=3x

3306=3x

x=1102