Ineed if 12 counters are 3/4of a set then what is the whole set

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?

The variable in a relation who’s value depends on the value of the independent variable is called what?

Evaluate the expression for the given value of the variable 7a - 4a for a =8