3.6x+4.5y when x=3 and y=7

Combined megan and kelly worked 60 hours.kelly worked twice as many hours as megan.how many hours did they each worked?

There is an entrance to the computer room at point e which lies on ab and is 5 feet from point a. plot point e on the coordinate plane. find the distance from the entrance at point e to the printer at point e

The length of a rectangular piece of land is 92 yards more than three times its width. the perimeter is 760 yards. find its dimensions.