X+4²=2 answer plz plz

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

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.

An elevator travels 310 feet in 10 seconds. at that speed, how far can't his elevator travel in 12 seconds?