Final answer:
Joe and Jake can swing on the trapeze at the same time as their total weight is less than 500 pounds.
Step-by-step explanation:
In order for Joe and Jake to swing on the trapeze at the same time, their total weight must be less than 500 pounds. Joe weighs 240 pounds, and Jake weighs 250 pounds. So, the total weight of Joe and Jake is 240 + 250 = 490 pounds, which is less than 500 pounds. Therefore, Joe and Jake can swing on the trapeze at the same time.