It costs $2.80 to make a sandwich at the local deli shop. to make a profit, the deli sells it at a price that is 170% of the cost. the sandwich sells for $

Pls , the question is in the picture!

The rumpart family is building a new room onto their house. the width of the new room will be 16 feet. the length of the room will be 4% greater than the width. write an expression to find the length of the new room. what will be the area of this new room?

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b