The lenght of a rectangular storage room is 2 feet longer than its width. what are the dimensions of the room if the perimeter of the room is 35 feet?

Can someone me out here and the tell me the greatest common factor

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?