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kaytee1916
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Posted: Sun Aug 21, 2011 9:28 pm |
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Joined: Wed Jun 16, 2010 12:17 pm Posts: 14
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Hi Everyone,
I would appreciate it anyone can elaborate on how the answer to the question below was arrived at:
Ben & Emma each start to grow a plant on same day. After 1 week both plants are 5cm tall. During the next 3 weeks Ben’s plant grows 'f' cm per week and Emma’s 'g' cm per week Emma’s plant is taller. When the plants are 4 weeks old how much taller is Emma’s plant taller than Ben’s in cm? The answer: 3(g-f)
Also, would anyone know the formula for the area of a hexagon? Q48, Test 3 of GL assessment Maths Pack 1 refers.
As always, any help would be greatly appreciated. Thanks!
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no_ball
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Posted: Sun Aug 21, 2011 9:48 pm |
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After four weeks ben plant is 5+3g After four weeks Emma plant is 5+3f
If Emma plant is bigger then...
(5+3f)-(5+3g)
Open up brackets
5+3f-5-3G
3f-3g
3(f-g)
QED...
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no_ball
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Posted: Sun Aug 21, 2011 9:50 pm |
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Area of regular hexagon is also sum total area of 6 equilateral triangles...
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kaytee1916
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Posted: Mon Aug 22, 2011 7:02 pm |
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Joined: Wed Jun 16, 2010 12:17 pm Posts: 14
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It all makes sense now. Many thanks, no_ball
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no_ball
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Posted: Mon Aug 22, 2011 7:48 pm |
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The trick is to break down the question into base level. Makes more sense after that.
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