Find two numbers if their ratio is 9:11 and their difference is 6. The numbers can be 27, 33 or __, __

Plz help I'm so dumb -_-

Mindy bought 5/8 pound of almonds and a 3/4 pound of walnuts. which pair of fraction cannot be used to find how many pounds of nuts she bought in all.

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?

Acircle has a circumference of 28.36 units what is the diameter of the circle