Pls help 25 points pls Identify the angle pair relationship

Angle 7 and 13
Angle 6 and 4
Angle 1 and 15
Angle 10 and 16
Angle 5 and 6
Angle 3 and 12
Angle 1 and 10
Angle 9 and 13
Angle 4 and 2
Angle 8 and 16

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?

Translate this phrase into an algebraic expression. 21 more than twice goran's savings use the variable g to represent goran's savings. need to know fast.

Sketch one cycle if the cosine function y=2cos2theta