A group of students went on a field trip. There were 3 boys for every 4 girls in the group if there are 20 girls how many students in all went on the field trip

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?

With both problems. a. s.a. p directions on photo ^

What is r i 4.5+10r=-6.5 with work pls