The best way to sell something is to have a buy one get one free sale
Hope this helped :)
I would say the 1st one is the only one correct. The 2nd one should be who, the 3rd one should more and likely be whom, and the last one should probably be who. I don't know if I'm 100% though. I hope I helped.
Answer:
The parts of an expression or equation being added or subtracted.
Explanation:
