If sin 7A = cos 3A, then m∠A is what?

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.

Witch represents the inverse of the function f(x)=1/4x-12

2x minus y equals 6, x plus y equals negative 3