Segment cd is congruent to segment df, e bisects df, and cd=14.2. find ef

Danny draws a transversal, t, on two parallel lines ab and cd, as shown below: he makes the following table to prove that the alternate interior angles are equal: which is the missing justification? (6 points) corresponding angles formed by a transversal on parallel lines are supplementary. corresponding angles formed by a transversal on parallel lines are congruent. co-interior angles formed by a transversal on parallel lines are congruent. co-exterior angles formed by a transversal on parallel lines are congruent.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

In a column proof the right column states your reasons