After arriving home from school, luis read for 1/3 of an hour. if he reads for 1 1/6 hours after dinner, how many hours will luis have read all together?

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.