Problem 4.4. consider the real function f(r) = r2 - 1. calculate each of the following. (1) the image/value of 5 under f. (2) all the pre-images of 15 under f, if they exist. (3) all the arguments associated with the value 20, if they exist. (4) all the pre-images of -10 under f, if they exist. hint. this is straight forward. just be careful with the terminologies. c..d.. th falloninga olaim ae wall ae tha "nronf

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