The domain of the following relation: r: {(-4, 8), (8, 10), (5, 4), (1, 6), (5. -9)} is

{8, 10, 4, 6, -9)
{-4, 1,5,8)
{-4, 8, 5, 1,5)
no domain exists

40 points. given: two congruent angles ∠c and ∠r are supplementary. prove: ∠r and ∠c are both right angles. it doesn't have to be exactly 10 rows.statements reasons1. 1. 2. 2. 3. 3. 4. 4. 5. 5. 6. 6. 7. 7. 8. 8. 9. 9. 10. 10.