The school store sells pens for $0.20 each and pencils for $0.30 each. Anthony spent $2.70 to buy a total of 5 pens and pencils. How many pencils did
Anthony buy? pencils
Help I need it now!

Aconstruction worker needs to put a rectangular window in the side of a building he knows from measuring that the top and bottom of the window have a width of 8bfeet and the sides have a length of 15 feet he also measured one diagonal to be 17 feet what is the length of the other diagonal