Final answer:
Samuel paid 12.5 dollars for his video game rentals.
Step-by-step explanation:
Samuel rented 5 video games from the store. The cost of renting v video games for a week is 2.5v dollars. To find out how much Samuel paid for his video game rentals, we need to substitute v with 5 in the equation.
Therefore, the amount Samuel paid for his video game rentals is 2.5 * 5 = 12.5 dollars.