SOLUTION: tour de desert barbara rode her bike for 5 hours . her bike then develeoped flat tire so waled 3 hours to town. she coverd 85miles. if she rides9mph faster than she walks. how far

Question 344393: tour de desert
barbara rode her bike for 5 hours . her bike then develeoped flat tire so waled 3 hours to town. she coverd 85miles. if she rides9mph faster than she walks. how far did she walk
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
barbara rode her bike for 5 hours.
her bike then developed flat tire so walked 3 hours to town.
she covered 85 miles.
if she rides 9 mph faster than she walks. how far did she walk.
:
Find the walking speed first
:
Let s = walking speed
then
(s+9) = biking speed
:
Write a distance equation; dist = speed * time
:
ride dist + walk dist = 85 mi
5(s+9) + 3s = 85
5s + 45 + 3s = 85
5s + 3s = 85 - 45
8s = 40
s =
s = 5 mph is the walking speed
then
3(5) = 15 mi is B's walking distance
:
:
Check solution by finding the total dist
5(5+9) + 15 =
5(14) + 15 =
70 + 15 = 85 mi
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