1. when jack and jill work together, they can carry a cooler of water up a hill in 12 hours. when jill works alone it takes her 7 fewer hours than when jack works alone. how long would it take jack, working alone, to carry a cooler of water up a hill? step by step please! ):

You are choosing between two health clubs. club a offers membership for a fee of $ 28 plus a monthly fee of $ 20. club b offers membership for a fee of $ 20 plus a monthly fee of $ 22. after how many months will the total cost of each health club be the same? what will be the total cost for each club? in __ months the total cost of each health club will be the same.