Help will give bring list

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.

How do i put 3(x+7) in distributive property

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.