Find the sum and express it in simplest form.
(-3n^3 - 3n^2 - 5) + (8n^3 + 6n^2 - 4)

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?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12