Final answer:
The cost is the same for Rink A and Rink B after 6 sessions.
Step-by-step explanation:
To find the number of sessions for which the cost is the same for Rink A and Rink B, we need to set up an equation and solve for the number of sessions. Let's define the cost of Rink A as a function of the number of sessions, A(x), and the cost of Rink B as a function of the number of sessions, B(x).
A(x) = 10x, where x represents the number of sessions for Rink A.
B(x) = 30 + 5x, where x represents the number of sessions for Rink B.
Now, we can set up the equation:
10x = 30 + 5x
Simplifying the equation, we get:
5x = 30
x = 6
Therefore, for 6 sessions, the cost is the same for both Rink A and Rink B.