Algebra-2

Let's assume Mark's speed is  miles per hour. Then Jessica's speed is  miles per hour.

We know that time , where  is the distance and  is the speed.

For Jessica, who travels a distance  miles at a speed of  miles per hour, the time taken  hours.

For Mark, who travels a distance  miles at a speed of  miles per hour, the time taken  hours.

Since the time taken by both Jessica and Mark is the same, we can set up the following equation:

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