Find the mad of this set of data.

6, 12, 10, 9, 8, 6, 2, 4, 8, 15

8
9
2.8
3.5

1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.

Me i’m stuck on all these questions besides the two bottom ones

How do i i solve this equation? -18 = x/3 + 3