Marta and Raul are studying the two rectangles A and B below. 

a. They calculate that the perimeter of A is given by the formula P =  6x +  4 and that the perimeter of B is given by the formula P =  2x + 10. Show that they are correct.

b. Marta says that the perimeter of A will always be greater than the perimeter of B because it has a ‘6x’ in its formula which is bigger than ‘2x’. Raul disagrees. He says that the perimeter of B will always be greater than that of A because it has a ‘+10’ in its formula which is bigger than ‘+4’. Explain whether either of them is correct.  

Transcribed Image Text:

3x A 2 X в 5