Final answer:
The tennis club needs 15 tables to seat 40 guests, as every 3 tables can seat 8 people.
Step-by-step explanation:
To determine how many tables are needed for 40 guests at the tennis club's banquet with every 3 tables seating 8 people, we need to calculate the total number of tables required. Since every 3 tables seat 8 people, we divide the total number of guests by 8 to find out how many sets of 3 tables we need.
The calculation is as follows:
- Divide 40 (number of guests) by 8 (number of guests per 3 tables): 40 / 8 = 5.
- Since we know 3 tables seat 8 guests, we multiply the 5 sets of 3 tables needed by 3 to find the total number of tables needed: 5 x 3 = 15.
Therefore, the tennis club will need 15 tables to seat all 40 guests.