anonymous
  • anonymous
a = ? , b = ?
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
anonymous
  • anonymous
4/8 = a/b for the first eqn yes?
anonymous
  • anonymous
now you need a another eqn

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anonymous
  • anonymous
well , we can find the distance between (12,0) and (3,9) , and that distance should be equal to a+b
anonymous
  • anonymous
distance between the points = sqrt [ ( 12-3)^2 + (0-9)^2 ] = sqrt [ 9^2 + 9^2] = sqrt( 2 x 9^2) = 9sqrt(2)
anonymous
  • anonymous
so a/b = (1/2) --> ie b =2a , and a+b = 9sqrt(2) 2 eqns, two unknowns, pretty easy to solve yes?
anonymous
  • anonymous
I assume you can solve them, ill leave it to you
anonymous
  • anonymous
i'm alittle confuse right now
anonymous
  • anonymous
it doesnt help if u dont say what it is you are confused about. nevertheless , this questionn is pretty similar to the other ones you put up ( though it is a bit harder ). The first eqn came from ratios of intersections of parallel lines
anonymous
  • anonymous
then we needed to find another eqn to relate a and b , because you need two eqns to solve two unknowns , and we obverse from the picture that a+b was a distance between two points
anonymous
  • anonymous
(h/H)2 = 9/25; Volume of large prism/Volume of small prism= (h/H)3
anonymous
  • anonymous
:S, dont really undertand what u want
anonymous
  • anonymous
my bad n it not that one up there a + b = sq root of (12-3)2 + (0-9)2. Once you have solved for a + b, then 4/12 = a/a+b .
anonymous
  • anonymous
I guess that would have been another way to get the second eqn
anonymous
  • anonymous
got is 12.7292206
anonymous
  • anonymous
are u still there?
anonymous
  • anonymous
what? the answers to the question are a=3sqrt(2) b= 6sqrt(2)

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