Khan Academy midpoint formula!! Please help

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

Susie wants to take her friend out for lunch. she wants to spend $9.75 each person. how much will she spend in all.