Which. equation is nonlinear

4x=12

3y=12

xy=12

3x-6y=12

Really need on these. i have no idea what to do

James wants to promote his band on the internet. site a offers website hosting for $4.95 per month with a $49.95 startup fee. site b offers website hosting for $9.95 per month with no startup fee. for how many months would james need to keep the website for site a to be a better choice than site b? define a variable for the situation. write an inequality that represents the situation. solve the inequality to find out how many months he needs to keep the website for site a to be less expensive than site b. using words, describe how many months he needs to keep the website for site a to be less expensive than site b.

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1