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11-08-2009, 08:56 PM
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#1
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algebra help!!! (reps)
#.. Erika and Andy are planning to meet at a location 5 miles from their house. Erika is running and Andy is riding his bike. Andy rides his bike at a speed that is 10 miles per hour faster than Erika runs. If it takes Erika 40 minutes (2/3 of an hour) longer to reach the location, set up and solve an equation to find Erika's speed.
no idea how to setup, or solve. please show work. will rep for help.
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11-08-2009, 09:07 PM
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#2
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upping this. i will paypal $2 for this. please help out.
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11-08-2009, 09:08 PM
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#3
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post pics of erika and let the misc decide.
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11-08-2009, 09:11 PM
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#4
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11-08-2009, 09:12 PM
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#5
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Misc Ninja
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jizz producer will do it for reps...he had a math help thread yesterday
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11-08-2009, 09:15 PM
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#6
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Quote:
Originally Posted by beautiizhername
jizz producer will do it for reps...he had a math help thread yesterday
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i searched that name under the search feature.. with no results...
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11-08-2009, 09:19 PM
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#7
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Erika flags down a car and sucks some dick for a ride to arrive before Andy.
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11-08-2009, 09:29 PM
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#8
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Quote:
Originally Posted by jizz_producer
finishing it off for you:
rearranging erika's equation you get: t=5/x
expand Andy's equation then sub in the above value:
5 = xt -(2/3)x +10t -(20/3)
since xt=5 and t=5/x
5 = 5 -(2/3)x +10(5/x) - (20/3)
doing a bit of rearranging:
20/3 = (-2/3)x + (50/x)
i multiplied every term by x:
(20/3)x = (-2/3)x^2 + 50
now i multiply every term by 3
20x = -2x^2 + 150
rearrange and divide by 2:
x^2 + 10x -75 = 0
(x+15)(x-5) = 0
x= -15 or x=5
since x>0
x=5
so erika's speed is 5mph
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you are the man. repped.
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11-08-2009, 09:32 PM
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#9
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Erika's speed and velocity + Andy's fist / Andy's speed and velocity x Erika's face=Erika should have stayed in the kitchen
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11-08-2009, 09:34 PM
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#10
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Extremely entertaining for a "math help" thread. 
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