Geometry question please help

What is the difference between regular convex and concave polygons

Scott’s bank account showed a balance of $750 on sunday. during the next five days, he made one deposit of $140 and numerous withdrawals of $180 each. let x represent the number of withdrawals that scott made. write an inequality that can be used to find the maximum number of withdrawals that scott could have made and maintain a balance of at least $100. do not use a dollar sign ($) in your response.

Perry observes the opposite parallel walls of a room in how many lines do the plains containing the walls intersect