80 people were surveyed about their opinion on pizza toppings. 60 people like cheese. 32 people like pineapple. 16 like both cheese and pineapple. How many people liked neither cheese nor pineapple on their pizza?

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?

Abag of jelly beans contain 13 pink, green, 20 yellow, 10 black, 7 red, and 11 orange jelly beans. approximately what percent of the jelly beans are pink and yellow?

How do you determine if an ordered pair is a solution to a given equation?