SOLUTION: A women can bicycle 22 miles in the same time as it takes her to walk 8 miles. She can ride 7mph faster than she can walk. How fast can she walk
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Question 997170: A women can bicycle 22 miles in the same time as it takes her to walk 8 miles. She can ride 7mph faster than she can walk. How fast can she walk
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = her speed walking in mi/hr
= her speed biking in mi/hr
Let = her time either biking or walking in hrs
---------------------
Equation for biking:
(1)
Equation for walking:
(2)
--------------
(2)
Substitute (1) ionto (2)
(1)
(1)
(1)
(1)
(1)
She can walk 4 mi/hr
------------------
check:
(2)
(2)
and
(1)
(1)
(1)
(1)
OK
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