Heather rides a motorized bike to work.  The bike gets about 100 miles per gallon and the tank holds about 0.4 gallon of gas.  If Heather uses the bike to drive 2.5 miles to work and then the 2.5 miles back home at the end of the day, how many days will Heather be able to ride her bike to and from work before needing to refill her gas tank?

Elementary Algebra
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Chapter5: Systems Of Linear Equations
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Heather rides a motorized bike to work.  The bike gets about 100 miles per gallon and the tank holds about 0.4 gallon of gas.  If Heather uses the bike to drive 2.5 miles to work and then the 2.5 miles back home at the end of the day, how many days will Heather be able to ride her bike to and from work before needing to refill her gas tank?

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