Which of the following expressions do not have a result of zero? why don't they? if not zero, what is their result? express your answer in complete sentences.
0 x (-7)
-8 - (-8)
0/(-4)
6/0

Which of the following best describes a basic postulate of euclidean geometry? a. all straight line segments have a midpoint. b. any straight line segment can be extended indefinitely. c. all right angles are formed from perpendicular segments. d. any two right angles are supplementary.