A rectangle has a length of 10 inches and a width of 5 inches. If the length is increased by x inches and the width decreased by twice that amount, express the area of the rectangle as a function of x.

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.