What is the missing constant term in the perfect square that starts with x^2+2x?

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 owner of the plant nursery where you were tells you to fill 350 ml bottles from a 30 l from a fertilizer

Use sigma notation to represent the following series for 9 terms.