Question 659283
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Hi,
Doug travels 5 times faster than jill's rate {{{highlight(r)}}}
jill's rate: r
Doug's rate:  5r
traveling in opposite directions they are 504 miles apart after 4 hours
Note: D = rt
  {{{r*4hr + 5r*4hr = 504mi}}}
              24r = 504
                r = 21mph, Jill's rate. Doug's rate is 105mph