Answer:
[tex]5d[/tex]
Step-by-step explanation:
Let d represent the number of days.
We have been given that a coin collector is able to collect five coins each day.
The number of coins after d days would be 5 times d.
We can represent this information in an expression as:
[tex]5d[/tex]
Therefore, the expression [tex]5d[/tex] represents the number of coins the collector has after d days.