Pls help I’m kinda new :(

Simplify 5x + 2y + 7x – y.

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?

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)

Edger needs 6 cookies and 2 brownies for every 4 plates how many cookies and brownies does he need for 10 plates