To find how many more minutes Tom can use without going over the limit of 500 minutes, we can set up the inequality based on the information provided. He has already used 230 minutes, and we need to determine the additional minutes (let's represent this with \( m \)) he can use without exceeding the limit of 500 minutes.
The correct inequality is:
\[ 230 + m < 500 \]
This means that the total minutes he has used (230 minutes) plus any additional minutes (m) must be less than the limit of 500 minutes.
Therefore, the correct response is:
230 + m < 500