In science class Sarah needed eight test tube use for three different experience the first experiment required 2test tubes in the other two experience required the same number of test tubes. how many test tubes were needed for each of the other two experiments?

Which lines are parallel? justify your answer. lines p and q are parallel because same side interior angles are congruent. lines p and q are parallel because alternate exterior angles are congruent lines l and m are parallel because same side interior angles are supplementary lines l and m are parallel because alternate interior angles are supplementary.