To write an algebraic expression for the total cost of renting the scooter, we can break down the costs as follows:
- The cost of renting the scooter per hour is $7.50, and if you rent it for \( X \) hours, the cost for the scooter will be \( 7.50X \).
- The cost to rent a helmet is a flat fee of $3.00.
Now, we can combine these two costs to create the total cost expression:
\[ \text{Total Cost} = 7.50X + 3 \]
So the algebraic expression that describes the total cost in terms of hours \( X \) that you rent the scooter is \( 7.50X + 3 \).