a doorway is 3 feet high and 9 feet high. what is the widest piece of drywall that can be taken through the doorway?

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 ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

Two numbers have a sum of -19. one number is x. what expression represents the other number?

Y= 4x + 3 y = - 1 4 x - 5 what is the best description for the lines represented by the equations?