What's the inverse of 5y+4 = (x+3)2 + 1/2

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.

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?

What is the definition of a surd.give an example.