Help me please lord be with me

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Find the solution(s) to x^2-14+49=0

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.