Has Cherbears deleted anyone else's answer? They have deleted all of my answer and I have no points now.

Can someone answer these problems for me

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?

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)