OpenStudy9
  • OpenStudy9
Need help with this word problem! Will medal!! Al bikes a trail to the top of a hill and back down. He bikes up the hill in m minutes, then returns twice as quickly downhill on the same trail. What is the total time, in HOURS, that Al spends biking up and down the hill?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
m/40
OpenStudy9
  • OpenStudy9
Why?
OpenStudy9
  • OpenStudy9
Then I will medal @tuxadog12

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OpenStudy9
  • OpenStudy9
Can someone explain?
OpenStudy9
  • OpenStudy9
@joyraheb
jim_thompson5910
  • jim_thompson5910
`He bikes up the hill in m minutes, then returns twice as quickly downhill on the same trail` how long (in terms of m) does he spend going downhill?
OpenStudy9
  • OpenStudy9
M/2
jim_thompson5910
  • jim_thompson5910
add `m` to `m/2` to get what?
OpenStudy9
  • OpenStudy9
2m/3
jim_thompson5910
  • jim_thompson5910
no
jim_thompson5910
  • jim_thompson5910
it might help to think of `m` as `2m/2`
Vianne
  • Vianne
You can't add a constant with a "like term." So it's 2m/2
jim_thompson5910
  • jim_thompson5910
2m/2 + m/2 = ???
OpenStudy9
  • OpenStudy9
3m/2
jim_thompson5910
  • jim_thompson5910
so that's the total time in minutes how do we convert to hours?
OpenStudy9
  • OpenStudy9
We multiply by 60
jim_thompson5910
  • jim_thompson5910
|dw:1449873838443:dw|
jim_thompson5910
  • jim_thompson5910
we multiply by the conversion factor `(1 hour/60 minutes) |dw:1449873922882:dw|
jim_thompson5910
  • jim_thompson5910
notice how the "minutes" unit cancels |dw:1449874001543:dw| leaving just "hours" as the only unit
OpenStudy9
  • OpenStudy9
So m/40!
jim_thompson5910
  • jim_thompson5910
yep, correct

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