Average, Mathematics

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A boy covered half of distance at 20km/hr and rest at 40kmlhr. calculate his average speed.

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The square of a positive number is 49 what is the number, The square of a p...

The square of a positive number is 49. What is the number? Let x = the number.  The sentence that is , "The square of a positive number is 49," translates to the equation x 2

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