An alloy of tin is 15% tin weigh 20 pounds . a second alloy is 10% tin . how much pounds of the second alloy must be added to the first to get a 12% mixture

Apath 3 m wide runs around the inside of a square park inside 60 m.find the area of the path.pls

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).