What is the sum of the largest and smallest recorded capacity?

Answer for 10 points show work you guys in advanced < 3

Astudent is solving a system of equations by substitution and comes up with the solution 3 = 3. assuming that he solved the problem correctly, which of the following can be said about this system of equations?

Kyle cut a 4 foot piece of construction paper to be 6.1 inches wide by 8.2 inches long. what is the area of the piece of construction paper in square inches