Pleeaaassseee I need help in this , algebraic expressions

I did them with letters went from a to j but same order .

Step-by-step explanation:

Hi , idk if you know how to resolve those or you just was bored so in the first one I did firstly started by exchanging the letters and there number so , I wish it helped you at least a little more, bye good luck in life , you gonna be amazing : )

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two