To determine an inequality for the maximum number of gigabytes Tyler can use while keeping his bill under $85 per month, we start by defining the components of his bill.
Tyler has a flat charge of $49.50 per month and an additional charge of $5 for each gigabyte used. If \( g \) represents the number of gigabytes Tyler uses, his total monthly bill can be expressed as:
\[ 49.50 + 5g \]
Since Tyler wants to keep his total bill under $85, we can set up the following inequality:
\[ 49.50 + 5g < 85 \]
Thus, the correct inequality that can be used to determine \( g \) is:
\[ 85 > 49.5 + 5g \]
So, the correct answer from the multiple choice options is:
85 > 49.5 + 5g