65 brianly won't let me add 65 points : cadd: write fractions in simplest from1: 5+ [-2 1/3] + [-3 1/6] =2: -4 1/5 + 3 2/3 + [- 1 2/5] =3: -12.4 + 19.1 + (-4.3) =

How to do this , and can some one explain

1. evaluate 8x(2)y9(-2) for x=-1 and y=2 2. simplify the equation. -() 3. simplify the expression. [tex]\frac{5}{x(-2) y9(5)}[/tex]

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 in pounds, w, of the contents that liz will ship to her friend if she must use a medium flat-rate box. use the drop-down menus to explain your answer.