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Frances can complete 91 oil changes in 7 days. How many oil changes can Frances complete in 11 days?

Answer :

kalanisc
Frances can change 143 oil changes in 11 days.
91 / 7 = 13: This represents how many per day. 

So 13 oil changes per day. 

Now times that by 11. 

13 x 11 = 143 Oil changes. 

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