What is 2/5 - 1/4 in simplest form

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 in pounds, w, of the contents that liz will ship to her friend if she must use a medium flat-rate box. use the drop-down menus to explain your answer.

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250

At a book fair, joe bought 24 books at 3 for $5 and had $2 left. how much money did he have at first?