Expand the polynomial (x + y)0

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?

What is the missing step in this proof ?

Find the distance from the theater to the library. leave your answer in simplest radical form if necessary. 12 √12 74 √74