Help as soon as possible please

Zoey made 5 1/2 cups of trail mix for a camping trip. she wants to divide the trail mix into 3/4 cup servings. a. ten people are going on the trip. can zoey make enough 3/4 cup servings so that each person gets one serving? b. what size would the servings need to be for everyone to have a serving?

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

Determine if the equation defines y as a function of x: 2xy = 1. yes o no