Help and explain with all three pls and thankyouu

Aflute is on sale for 20% off. including the discount and 8% tax, the sales price is $216.

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

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.