Question 411244
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Hi
Let x and (x-92)represent the rates each of the jets are traveling
Question states*** D= r*t
   9x + 9(x-92) = 10,602mi
Solving for x
        18x = 10602+ 825
        18x = 11430
          x = 635mph.  The other jet traveling at 543mph.  (635-92)

CHECKING our Answer***
  9hr*635mph + 9hr*543mph = 10,602mi