Which student correctly solved their equation below?

How many $20 bills do you need to have to make $280

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd

My final challenge question of the day! i have no tests, nothing to do this for, it is simply giving away free points for a you tube video! so 50 free points for answering the most simple question ever! here is the key to getting brainiest for this question. answer in under 50 seconds. you think you can do it. i think you can. here is the question: 1x2= i know! easiest question ever! and yes! if you answer this question, you will be on you so come on and get the free 50 while you can!