What is the change of elevation between 8,500m and -300m?

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

Complete the equation of the line through (−10,3) and (−8,−8). use exact numbers.

Which of the following are accepted without proof in a logical system? check all that apply.