Please help this is due tomorrow!! angel is Eight years younger than his brother Alex together their total age in years is 30. select two equations of a system that can be solved to find both ages

x+y=30

x-y=30

x+y=8

x-y=8

How many years old is angel?

How many years old is Alex?

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

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?

Find the midpoint m of z1=(8+5i) and z2=(12+3i)