Response:
Option B -
and 
Detailed explanation:
Given: The Thrill amusement park has an entrance fee of $40 and charges $5 for each ride, x. The Splash water park demands an entry fee of $60 and $3 extra per ride, x.
To determine: Which equations can be used to find where the cost per ride, y, becomes equivalent at both amusement parks?
Solution:
Let x designate the number of rides and
y represent the cost per ride.
Based on the details,
The Thrill amusement park database includes an entry fee of $40 and charges $5 for each ride.
The equation format will be 
While the Splash water park charges an entry fee of $60 and an extra $3 per ride.
The equation format here is 
Therefore, the required system of equations is
and 
Consequently, Option B is valid.