Ineed finding the surface area. and you

Ineed with number 6 , explain how to get 1978

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

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.