HUGE POINTS GEOMETRY PLZ HELP

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.

X2 + y 2 = 36 x + y = 6 solve the system of equations.

Solve x+3y=6 and 4x-6y=6 by elimination . show work !