\frac{211\text{ miles}}{15\text{ gallons}}=\frac{211}{15}\text{ miles/gallon}=14.067\text{ miles/gallon}
the best estimate of the car's miles per gallon is 14.067\text{ miles/gallon}
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Math question: Find the basis of a vector space formed by {(2, -1, 3), (1, 0, 4), (3, 1, 5)} in R³.
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