A football team loses 4 yards on each of 3 consecutive plays. Find the total change in yards from where the team started

Find dy/dx using implicit differentiation ln(20+e^xy)=y

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.

Pls never taught i’m really confused and i rlly need