Which property of polynomial addition says that the sum of two polynomials is always a polynomial?

Graph the equation. select integers for x

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !

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.