How do you do: -x-x-3x+2-5 ?

All per-unit concepts rely on ratios,meaning,to provide a type of measurement

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?

Which number completes the inequality? 2/3 < _ < 7/9