Which expression would be easier to simplify if you used the commutative property to change the order of the numbers?
A. (–130) + 42+(-20)
B. 140 + 60 + 17
C. (-1/5) + 2/5 +(-1/2)
D. 75.5 +5.5+ (-125)

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