What is the simplest form of the following polynomial: 4x3 + 5x – x3 + 2x2 + 17 - 3x3 + 5x – 2x2 + 3

Answer choices.
10x + 20
X+2
10 (x+2)
4x3 + 2

Please help and answer this and show how you got the answer, no robots please
(Worth 10 points)

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem