Am i doing this right? i circled the answer that i got. we’re supposed to use division to solve the questions.. let me know if i’m doing this right!

What is 20+(5 x 2/5 )+ 3 show your work

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

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)