3. Someone inform me that our manager is going to move to New York.

⇒  I am informed that our manager is going to move to New York

4. The supervisor announced that the workshop was delayed about 2 hours because of mechanical problems.

⇒ It was announced that the workshop was delayed about 2 hours because of mechanical problems.

8. I believed my brother would pass this college entrance exam.

⇒ It was believed that my brother would pass this college entrance exam.

9. People have persuaded me that they will join with me to the party.

⇒ I have been persuaded that they will join with me to the party.

10. The class president notifies all the members that they will have to study harder next term

⇒  All the members are notified that they will have to study harder next term.