Mathematics, 17.12.2020 02:00, neariah24

Elsa is participating in a 5-day cross-country biking challenge. She biked for 54, 46, 67, and 60 miles on the first four days. How many miles does she need to bike on the last day so that her average (mean) is 55 miles per day?

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Elsa is participating in a 5-day cross-country biking challenge. She biked for 54, 46, 67, and 60 mi...