The soccer coach wants to buy t-shirts for his soccer team. The table below shows the cost of the shirts.



c =

c = s + 21

c = 8s

c = 7s + 3

Without knowing the specific amounts for s (number of shirts), it is difficult to determine which option is the best for the soccer coach. However, the coach can use these equations to calculate the cost for different numbers of shirts and determine the most cost-effective option.

To find the cost of the t-shirts, you can use the given equations. Let's solve each equation step-by-step:

1. c = s + 21: In this equation, c represents the cost of the shirt, and s represents the number of shirts. To find the cost, you need to know the value of s.

2. c = 8s: In this equation, c represents the cost of the shirt, and s represents the number of shirts. To find the cost, you need to know the value of s.

3. c = 7s + 3: In this equation, c represents the cost of the shirt, and s represents the number of shirts. To find the cost, you need to know the value of s.

It seems like there is missing information or context in the problem. Without knowing the value of s, we cannot determine the exact cost of the t-shirts.