Final answer:
Tom suspects that Gatsby and Wolfsheim are involved in criminal activities together.
Step-by-step explanation:
In F. Scott Fitzgerald's novel The Great Gatsby, Tom does not explicitly state any discovery about Gatsby's relations with Wolfsheim. However, it is implied that Tom suspects Gatsby and Wolfsheim are involved in criminal activities together. This is based on Tom's knowledge of Wolfsheim's criminal background as a well-known bootlegger and Gatsby's sudden wealth and connections to illegal activities.