Answer:
I don't know
Step-by-step explanation:
i don't know
Answer: 
Step-by-step explanation:
Given :

add 2 to both sides

Therefore :


The main piece of computer software on which every other piece of software relies is referred to as the "operating system". It is responsible for all the major channels of communication between the software and the hardware.
Answer
42
Because that angle is 90 degrees so 90-48-42