Mr Thicky-pants here couldn't rearrange the following, can someone show me line by line how it should be done please:
v/(4x^2) = w/y
x=?
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Maths homework fail!
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Posted 5 months ago #
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v/(4x^2) = w/y
v = (w/y)*(4x^2)
v/(w/y)=(4x^2)
(v*y)/w =(4x^2)
(v*y)/4w =x^2
x=((v*y)/4w)^0.5
(^0.5 is to the power of 0.5, same as square root)Edit: assuming that the (4x^2) is 4*x^2, not (4x)^2
Posted 5 months ago # -
x=(vy/4w)^0.5
Posted 5 months ago # -
Rather than line by line I tend do a quick cheat on ones like this and put some real numbers in so -
6 / 3 = 4 / 2 is the same layout as -> v / (4x^2) = w / y
3 = (6* 2) /4
That way you can do a quick sanity check to see the equation is still correct.
Sticking the symbols back in
4x^2 = (v*y)/w
x^2 = ((v*y)/w)/4
x = Sqrt((v*y)/w)/4)
or
x = Sqrt((v*y)/(4w))
Posted 5 months ago # -
Thank you all, I can now help my son with the rest of his homework
Posted 5 months ago #
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