find the values for SIN V and tan y drag response into the corresponding box trigonometry

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

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

Which choice has the correct steps in graphing the solution set to the following inequality? -45_> 20x-5y