He drove 100 miles at mph. .This took: .He drove 100 miles at [img > mph. .This took: . hours.Total driving time: . hours.He drove a total of miles at an average speed of 50 mph. .This took: . hours.There is our equation: .. . which simplifies to: .Since the cars were driving forward at all times: \:0" alt="x,y \:>\:0" align="absmiddle">. . Hence, the domain of is: \:25" alt="x \:> \:25" align="absmiddle">

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