What is the sum of the polynomials? (6x+7x+x^2)+(2x^2-3x)

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.

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

£100.80 divided by 14 equals 7.2 how would we put this as money