if the nth term of an Arithmetic progression is X and it's (2n)th term is Y then find (3n)th term of arithmetic sequence

Can someone me with these two circle theorem questions asap?

W-16=-12 solve each one step equation plz

20 points 1. your friend, taylor, missed class today and needs some identifying solutions to systems. explain to taylor how to find the solution(s) of any system using its graph. 2. taylor graphs the system below on her graphing calculator and decides that f(x)=g(x) at x=0, x=1, and x=3. provide taylor some feedback that explains which part of her answer is incorrect and why it is incorrect. f(x)=2x+1 g(x)=2x^2+1