Jeff can wax a floor in 9 minutes. One day, his friend Perry helped him and they finished in only 5.76 minutes working together. How long would it take Perry to do the job
alone?

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Step-by-step explanation:

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.