Answer:
An operating system has three main functions: (1) manage the computer's resources, such as the central processing unit, memory, disk drives, and printers, (2) establish a user interface, and (3) execute and provide services for applications software.
3 is correct because if brings you to the lock screen and lets you restart the computer
1 is wrong because if you disconnect it there is a chance if won't connect and power it anymore.
Do You mean x= x / d ?....because there is no " \ " in math operations
This is too little points for a question I’m sorry.
