Use the diagram to answer the question. Fill in the blank for the letter given within the missing reason in the flow proof.

The proof of a║b is as follows;

1) m∠5 = 40°                Reason a. Given

2) m∠2 = 140°             Reason b. Given

3) m∠5 and m∠2 are supplementary Reason c. Two angles that sum up to 180°

4) m∠5 and m∠2 are same side interior angles Reason d. Same side interior angles are angles that are located on the same side of a transversal and are located adjacent to each other in between the two lines

5) a║b Reason e. Same side interior angle converse theorem (When the interior angles between two lines cut by the same transversal are supplementary, the two lines are parallel)

Step-by-step explanation:

(x+3)(x+7)

step-by-step explanation:

the first option is the answer.