A triangle has side lengths of (4.7u-2.6)(4.7u−2.6) centimeters, (9.4u+9.1)(9.4u+9.1) centimeters, and (6.2v-8.7)(6.2v−8.7) centimeters. Which expression represents the perimeter, in centimeters, of the triangle?

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.