Question 1175277
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Hi

 D = rt  0r  t = D/r 
(119-x)/14mph + x/7mph = 11hr
(119-x) +2x = 11hr*14mph
        x = 11*14-119 = 35mi which Ariana walked in 5hr   {{{35/7}}}
 and 119-35 = 84mi which Ariana biked in 6hr   {{{84/14}}}
 
Wish You the Best in your Studies.
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