sorry i have to comment to "answer" a question... so i can ask a question.. have a nice day.
Answer:
You draw it on the graph right
Since the boxes are identical we can say that the total height is 3 times that of a single box:
Total = 3 * 56.4cm
Total = 169.2cm
Since 16 - 29 are systems of equations, the easiest way would possibly be through elimination because all you'd have to do is add the two equations then solve for your variable then plug in that number to one of the equations and then solve for the remaining variable, and then you'd get an ordered pair as your solution.
