I need help.. I already know Number 1 and 2, but I need help on the rest. Thank you for your patience, and kindness, (if you answer) I'd really appreciate it if you answer!

Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?

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.

What is 60.9643790503 to 5 decimal