My Math Forum Find the normal average rate at which Isatu walks to school.

 Algebra Pre-Algebra and Basic Algebra Math Forum

July 19th, 2014, 11:30 PM   #11
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Math Focus: Geometry
Quote:
 Originally Posted by Denis Yes; multiply by 2: 2v^2 - v - 15 = 0 Now factor: (2v + 5)(v - 3) = 0
No need for multiplication. (v+2.5)(v-3)=0

 July 19th, 2014, 11:45 PM #12 Senior Member     Joined: Jan 2012 Posts: 724 Thanks: 7 I can see clearly that the equation above cannot be solved using factorization method. Or could it be solved using factorization method? Using quadratic formula, we will come to a point where we have $\displaystyle \frac{0.5\pm\sqrt{30.25}}{2}$ = $\displaystyle \frac{0.5\pm5.5}{2}\rightarrow \\ v=3 \;or -2.5$ So normal rate = $3km/h$
July 20th, 2014, 12:26 AM   #13
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Quote:
 Originally Posted by tahirimanov -2.5 is also valid solution, if Isatu walks backwards.
How do you mean? Could you explain what you mean using equation?

July 20th, 2014, 12:32 AM   #14
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Math Focus: Geometry
Quote:
 Originally Posted by Chikis How do you mean? Could you explain what you mean using equation?
Ask to Denis, he will explain....

 July 20th, 2014, 09:34 AM #15 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,447 Thanks: 946 EXPLANATION: Sir Imanov is presently occupied playing Grepolis, and will be back to you at some point in the hopefully near future. Please be patient. ...by Ample Annie, Denis' secretary and, and....
July 21st, 2014, 08:30 AM   #16
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Math Focus: Geometry
Quote:
 Originally Posted by Denis EXPLANATION: Sir Imanov is presently occupied playing Grepolis, and will be back to you at some point in the hopefully near future. Please be patient. ...by Ample Annie, Denis' secretary and, and....

July 21st, 2014, 08:36 AM   #17
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Quote:
 Originally Posted by tahirimanov
What? You want to meet Ample Annie?

July 21st, 2014, 09:06 AM   #18
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Math Focus: Geometry
Quote:
 Originally Posted by Denis What? You want to meet Ample Annie?
Yes.

And Chikis, please change your profile picture. It is a math forum, not Sunday Baptist Church...

 July 21st, 2014, 10:37 AM #19 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,447 Thanks: 946 You sure? She has a smashed nose (bar fight) plus smells bad under the armpits. Chikis didn't listen to me...hope he listens to you...

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