On a field trip when their bus breaks down 40 miles from the school. a teacher takes 5 of them back to school in her car, travelling at an average speed of 40 miles per hour.
the other 5 students start walking towards school at a steady 4 miles per hour.
the teacher drops the 5 at school. then immediately turns around and comes back for the others, again travelling at a steady speed of 40 miles per hour. how far have the students walked by the time the car reaches them?

Efficient homemakers ltd. makes canvas wallets and leather wallets as part of a money-making project. for the canvas wallets, they need two yards of canvas and two yards of leather. for the leather wallets, they need four yards of leather and three yards of canvas. their production unit has purchased 44 yards of leather and 40 yards of canvas. let x be the number of leather wallets and y be the number of canvas wallets. draw the graph showing the feasible region to represent the number of the leather and canvas wallets that can be produced.