What is the difference between fact and opinion

If there were no system of checks and balance,the process of government would eventually fall apart. do you agree with this opinion? why or why not?

When deciding on an apartment what should you do first?

Around the third week of a college class, a professor decides she’s had enough, is tired of dealing with bureaucracies, and wants out. so one day, instead of coming to class, she flies to tahiti and sells souvenirs on the beach. if this happened, the college would simply assign a substitute to finish the course. what does this tell you about the nature of the authority wielded by a professor?