Can someone please help my brain can’t process information anymore

You have 3 boxes, one "strawberries"; one "mentos" and one "mixed".but you know that all the labels are in incorrect order .how do you know witch is witch?

An air conditioning system can circulate 350 cubic feet of air per minute. how many cubic yards of air can it circulate per minute?

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab