1. If y<span>ou have jogged 5 miles from the park at a rate of r miles per hour, then the time you need to do this is 
hours (
, where S is distance, v-speed and t-time).
</span>
2. W<span>hen you run back to the park, your average speed increases by 1 mph and become r+1 mph.
</span>
3. I<span>t takes
hours to jog 5 miles back to the park</span>
4. T<span>he total jogging time T is
hours.</span>
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5. If you jogged away from the park at an average speed of 4 miles per hour, then r+1=4 and r=3. The expressionwill take look
<span>
hours.</span>
</span>
2. W<span>hen you run back to the park, your average speed increases by 1 mph and become r+1 mph.
</span>
3. I<span>t takes
4. T<span>he total jogging time T is
<span />
5. If you jogged away from the park at an average speed of 4 miles per hour, then r+1=4 and r=3. The expression
<span>