BC would equal the same as EF, they are similar. All you would have to do is figure out the pre image (BC) of EF.
Answer:
Step-by-step explanation:
dang this one is hard lol
(5x-12)^2
Square factor of 25 is 5.
Square factor of 144 is 12.
Hope this helps. I didn't understand what to do with it.
3.5 because if you divide 252 by 72 you get 3.5 :D