How can you indicate a discharge date of a week from now?

The correct way to indicate a discharge date of a week from now is by using the expression that accurately reflects adding a week to the current date. In this scenario, if "y" represents a certain date, then adding 7 days to that date (which equals one week) is mathematically accurate. This means that the option that encapsulates this timeframe is the one that states "y + 7."

Although using "t + 7" might seem like it could also serve the purpose depending on what "t" is defined as, "y" is typically understood as today's date in such contexts. Therefore, the appropriate expression to denote a week from the current date is indeed adding 7 days to it, thus aligning with common conventions regarding date calculations.