Alright alright i need help I dont understand polynomials at all, so if someone can answer this and explain it in a simple, understandable way i will love you forever

Which shows the pre image of triangle xyz

Problem fathi wants to print out a pdf document that is 48 pages long. to save paper, he decides to print on both sides of each sheet and to print two pages on each side of the sheet. how many sheets of paper will he need?

Just tell me how to set up the equation.