Answer:
Step-by-step explanation:
I don't know what you were supposed to do with 3 but 4 looks much easier.
It's telling you to increase the side lengths by a factor of 3y
4x(3y) + 4x(3y) = 3y * 3y
12xy + 12xy = 9y^2
Perimeter = 24xy + 9y^2
I can't see anything else to do with this question. If you think I've misread it or there is more to it, leave me a note.
