Alaina was asked whether the following equation us an identity: (2x+1)^2-(x+1)^2

Can't gugys answer the ratio question. this is urgent the plans of a building is drawn toward scale of 1: 1000. kfc the foyer on the plans measures 62mm by 54mm, how large is the foyer in real life?

Can someone me and plz do the problem

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?