Determine if the pairs of expressions below are always equivalent. Prove your answer A. 4n + 12 and 4 (n +3)

B. m + m 3m and 3m + 2

C. 4x + 8y and 4 (x + 8y)

D. 3 (2t + 2 ) and ( t + 1 ) x 6

E. p + p and p + 7​

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.