Question 1143020
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            You can solve the problem using equation/equations.



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Let x is Joe's walking rate in miles per hour, now unknown.


Then you have this "distance" equation


    4*2.5 + 4x = 16  miles,


saying that the total distance is the sum of partial distances.


     10   + 4x = 16,

     4x        = 16 - 10 

     4x        = 6

      x        = {{{6/4}}} = 1.5 miles per hour.


<U>ANSWER</U>.  Joe4's walking rate is 1.5 miles per hour.
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;You also can solve the problem mentally, without using equation/equations.



<pre>
In 4 hours, Jill walked  4*2.5 = 10 miles.


Hence, Joe's part was only  16 - 10 = 6 miles.


So, Joe walked  6 miles in 4 hours.


It means that Joe's rate is  {{{6/4}}} = 1.5 miles per hour.


You get the same answer.
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