How would you solve "2sin(7θ)[(cos9θ(θ)-sin^2(θ))+(sin( 9θ(2θ))]-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.

Could someone with number 1 and 2

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.