What is 9% of 31? Do not round, write the exact amount

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?

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

The ratio of men to women working for a company is 4 to 5 . if there are 90 women working for the company, what is the total number of employees?