Nadine bought the ingredients for 24 cupcakes for $5.60. she sold each cupcake for $1.30. she saved 25% of the profits and used the rest to buy a new sketchbook. how much did nadine's new sketchbook cost? a. $6.40 b. $7.80 c. $19.20 d. $23.40

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