Fast 20 pts! simply (- 6/5)^3 a) 216/125 b) 18/15 c) - 18/15 d) - 216/125

How do you use the elimination method for this question? explain, because i really want to understand!

There is an entrance to the computer room at point e which lies on ab and is 5 feet from point a. plot point e on the coordinate plane. find the distance from the entrance at point e to the printer at point e

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?