4. simplify the following expression: 3(5 – 12) + 4 ÷ 2 (1 point)

–19

19

–23

–8.5

5. simplify the following expression: -16-8/2 + 25 ÷ 5 + 1 (1 point)

–18

6

10

–6

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