Simplify expression and show work please

Factor this polynomial completely x^2-64

What other information do you need to prove triangle dac=bca by asa

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.