Asked by Anneliese
It takes 7 hours for Isabella to rake leaves by herself.Her brother can work 3 times as fast.if they work together,how long will its take them to rake leaves?
My answer: Isabella can do one job in 7 hours (1/7in one hour).Matthew does 3/4 of the job in one hour. Together they do 1/7 + 3/7 =4/7 of the job in one hour. They do the entire job in 7/4 or 1.75 hours.
My question: how do I show just the Rate,Time,and Work Done by each person?
My answer: Isabella can do one job in 7 hours (1/7in one hour).Matthew does 3/4 of the job in one hour. Together they do 1/7 + 3/7 =4/7 of the job in one hour. They do the entire job in 7/4 or 1.75 hours.
My question: how do I show just the Rate,Time,and Work Done by each person?
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