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Offlinelearningtofly
Ancient Aliens
Male


Registered: 05/21/07
Posts: 15,105
Loc: Out of this world
Last seen: 12 years, 5 months
Algebra
    #14465106 - 05/16/11 10:00 PM (12 years, 8 months ago)

I'm so high this is taking me too long help me out.

A fish swims 5mph in still water and goes 8 miles downstream in the same time it goes 2 miles upstream how fast is the current?


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OfflineSteezeMonkey
Registered: 11/06/10
Posts: 319
Last seen: 4 years, 7 months
Re: Algebra [Re: learningtofly]
    #14465166 - 05/16/11 10:13 PM (12 years, 8 months ago)

Still water.. its a trick question?


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InvisibleJohn
ssdp.org

Registered: 08/08/03
Posts: 7,026
Loc: Vancouver, B.C.
Re: Algebra [Re: SteezeMonkey]
    #14465186 - 05/16/11 10:19 PM (12 years, 8 months ago)

It mentions still water just to let you know the base speed I think.

So if he swam for 1 hour at 5mph downstream and goes 8 miles it's 3 mph more than expected.

Then if he swan at 5mph upstream for an hour and only went 2 miles it's 3 mph less than expected.


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There's a thin line between sanity and insanity... and I just snorted it.


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Offlineplayapez
Strangest

Registered: 06/13/09
Posts: 424
Last seen: 9 years, 6 months
Re: Algebra [Re: SteezeMonkey]
    #14465191 - 05/16/11 10:20 PM (12 years, 8 months ago)

3mph... long answer incoming... oh, someone beat me to the short answer :P

The formula is -
8/(5+x)=2/(5-x)

Since you know the time is the same, you just use the basic Time = Distance over Rate formula and just make x be the current's speed.

I assume you know how to solve for x from there.


Edited by playapez (05/16/11 10:26 PM)


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Offlinelacma50
I'm a teapot


Registered: 03/13/09
Posts: 1,886
Last seen: 1 year, 1 month
Re: Algebra [Re: SteezeMonkey]
    #14465195 - 05/16/11 10:21 PM (12 years, 8 months ago)

Quote:

SteezeMonkey said:
Still water.. its a trick question?




I think it means a fish is able to swim at 5mph in still water, not that its in still water.


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"Any rational person changes their mind when confronted with new evidence."




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Offlinepmb
12121212
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Registered: 08/11/08
Posts: 2,567
Loc: Washington
Last seen: 9 years, 7 months
Re: Algebra [Re: lacma50]
    #14465247 - 05/16/11 10:32 PM (12 years, 8 months ago)

Set my equation up wrong :frown: Distance rate time problems are so hard for me.


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Don't smell the flowers, They're an evil drug to make you lose your mind


Edited by pmb (05/16/11 10:33 PM)


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OfflineKonyap

Registered: 06/30/07
Posts: 33,945
Loc: Planet Piss
Last seen: 4 years, 2 months
Re: Algebra [Re: pmb]
    #14465402 - 05/16/11 11:01 PM (12 years, 8 months ago)

im finding the volume of cylindrical areas and shit tommara

:feelsgoodman: to not be a sheep fucker


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Invisibleblewmeanie
I'm a teapot User Gallery


Folding@home Statistics
Registered: 10/01/06
Posts: 28,984
Loc: Flag
Re: Algebra [Re: Konyap]
    #14465472 - 05/16/11 11:18 PM (12 years, 8 months ago)



You're still a sheep fucker from where I'm sitting.


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The Prophecy!

Learn To Code


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OfflineKonyap

Registered: 06/30/07
Posts: 33,945
Loc: Planet Piss
Last seen: 4 years, 2 months
Re: Algebra [Re: blewmeanie]
    #14470817 - 05/17/11 11:13 PM (12 years, 8 months ago)

ohhhh


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OfflineKonyap

Registered: 06/30/07
Posts: 33,945
Loc: Planet Piss
Last seen: 4 years, 2 months
Re: Algebra [Re: Konyap]
    #14470836 - 05/17/11 11:16 PM (12 years, 8 months ago)

Im a sheep Lover
:feelsgoodman:


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