I just bought a punching bag and it came with these two thing. Anyone know what that is and how to use it?

Which conjunction is disjunction is equivalent to the given absolute value inequality? |x+2|< 18

Use set builder notation to represent the following set: { -3, -2, -1, 0}

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.