2. Which of the following is true about rational expressions? a. x2 - x + 1 is not a rational expression.
b. The degree of the numerator is less than the degree of the denominator in a proper rational
expression
c. Rational expressions can be defined when the denominator is zero, as long it has at least one
real solution.
x
d. is a proper rational expression.
x+3

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