Show work ! solve the equation by completing the square. if necessary, round to the nearest hundredth.
x^2-18x=19

a. 1; 19
b.-1; 19
c.3; 6
d.-3; 1

solve x^2-81=0

a.0
b.-9
c.-9,9
d.9

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