ANSWER ASAP I AM GIIVING 25 POINTS JUST TELL ME THE ANSWER NO EXPLANATION NEEDED

Which of the following can be used to explain a statement in a geometric proof?

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g

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.