Which of the following functions notations corresponds to the equation below? Can you please help me?

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?

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2