Algebra 1 grade 9 rate of change & slope: activating strategy would anyone know how to answer this problem? a plumber charges a fixed fee of $50 to show up at your house and then $60 per hour for repairs. the plumber is at the house for 6 hours. what is the constant rate portion of the situation? what would be the cost of the repair bill?

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