Round to the nearest tenth ​

How do i solve uniform motion problems?

You work for a landscape company that just got a contract to re-mulch a park. the area that needs mulching is 30 feet by 60 feet. they want a 3 inch layer of much on the area. the company has bags of mulch that cover 2 cubic yards that cost $4.00 per bag. how much will it cost the consumer just in materials to re-mulch the area (round to the nearest dollar)?

What classification best describes 5x+10y+15z=60 2x+4y+6z=60 x+2y+3z=60