The base of the pyramid below is a square, and point E is directly above the center of the square, which is F

A. 10.3 in
B. 11.4 in
C. 16.1 in
D. 19.0 in

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.

Abc4n: 2mm: n2: 41: 2m: n=1: 2