Answer:
12
Step-by-step explanation:
(8+11+14+13+14+9+15)/7 = 12
+3 . I think, hope this helps
The answer would be $3 becaus of x = $12 and y = $9. $12 - $9 = $3.
Part a - triangles EGD and FGD are similar
part b - we know this because they have the same interior angles. both are 45,45,90 triangles