Can a hermaphrodite have a baby with them

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

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

Graph the system of equations. {6x−4y=−244x−8y=−32 use the line tool to graph the lines.