Only boxes less than 3 1/2 feet wide will fit through a doorway. which measurements show the widths of three boxes that will fit through a doorway?choices: a. 36 in., 42 in., 40 in. b. 42 in., 43 in., 38 in. c. 40 in., 37 in., 41 in. d. 38 in., 40in., 42 in.

C and D will fit through the doorway. As a standard, box dimensions are length x width x height. Because our constraint is width, you need to look at the middle answer. 3 1/2 feet is 42 inches. Since we need boxes less than 42 inches wide, we can eliminate A and B. C and D are less than 42 inches in width.

3x+9+4x+x=8x+9that's the answer for your question.