Please show step by step Part A A physics student spends part of her day walking

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Please show step by step

Part A A physics student spends part of her day walking between classes or for recreation, during which time she expends energy at an average rate of 290 W. The remainder of the day she is sitting in class, studying, or resting; during these activities she expends energy at an average rate of 120 W If she expends a total of 1.4x107 J of energy in a 24-hour day, how much of the day did she spend walking? Express your answer using two significant figures hours Submit My Answers Give Up

Explanation / Answer

290x + 120y = 1.4×107 J ……….eq1

and

x + y = 24*60*60……….eq2

calculating for x

290x + 120y = 1.4×107

120x + 120y = 120*24*60*60

                          

170x = 3632000

x = 21364.7059 seconds

x = 5.9 hours

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