Which statements are true ? Check all that apply. A. DE ≅ D’E’
B. EC ≅ E’C’
C. ED ≅ D’C’
D. C’D ≅D’F’
E. D’C ≅DC
F. ∆CDE ≅ ∆C’D’E’

The volume is 2212m cubed

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.