Tammy is participating in a 4 -day cross-country biking challenge. She biked for 54 , 6

timer Asked: May 19th, 2015

Question description

Tammy is participating in a 


-day cross-country biking challenge. She biked for 



, and 


 miles on the first three days. How many miles does she need to bike on the last day so that her average (mean) is 


 miles per day

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