Need asap !
48. lemonade laronda wants to make fresh lemonade. the recipe she finds online recommends
that the fresh lemon juice should be 20% of the total volume. she has 18 ounces of fresh lemon
juice. how much water should she mix with the lemon juice?

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?

Which choice represents the sample space ,s for this event

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?