I really have no idea where to start with this. Could someone please exaplin the answer and how they got it? Theres a lot of these on my thing and I'd like to understnad it so that I can do the others on my own. Teachers aren't in office today so I can't ask for help :'(

Thankyou!!

I really have no idea where to start with this Could someone please exaplin the answer and how they got it Theres a lot of these on my thing and Id like to unde class=