Help please! lots of points granted!:)

Average acceleration: i have no idea how to do this.

What is the approximate value of  x  in the equation below.–3.396–0.7080.3040.955

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.