4(a−b)+6b (−3)∙(2a+b)−4(b−a) (−2)∙(2a−b)+3(a+b) (−5)∙(3b−2a)−6(a+2b) can u simplify these each line is a new problem

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?

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

Write the expression 7x^3-28xy^2 as the product of 3 factors