anonymous
  • anonymous
Can someone please explaine ratios and solving proportions? Thanksss(:
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Ratios and proportions are fractions. Remember equivalent fractions? 1/2 =2/4=5/10=14/28 Well ratios are fractions, and since they're usually maintained, you can compare different values as long as you keep the same ratio. Do you have a specific problem to look at?
anonymous
  • anonymous
um, 18/20 K/110... it says to use cross products! What is that?
anonymous
  • anonymous
@Rudy

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anonymous
  • anonymous
So your ratio is 18/20 and since a ratio is maintained, you can say that it equals k/110 so: \[\frac{18}{20}=\frac{k}{110}\] Which you can solve as any equation. To isolate k, multiply times 110 on both sides. \[\frac{18*110}{20}=\frac{k*110}{110}\] \[\frac{18*110}{20}=k\]
anonymous
  • anonymous
there are others but i woll try my best on them! I just dont under stand this one!
anonymous
  • anonymous
*Will
anonymous
  • anonymous
so its 1,800?
anonymous
  • anonymous
haha, thats way off!
anonymous
  • anonymous
Just remember a ratio is maintained. So you can equate the ratios given, no matter the change in the amount... Like unit prices. If someone says a quart of oil is 3.25 how many can you buy with 22.75 Well the fraction is: \[\frac{quarts of oil}{price}=\frac{1}{3.25}=\frac{x - quarts}{22.75}\] Hope that helps. Let me know if you have any you're stuck on, I may take time to answer, but I will.
anonymous
  • anonymous
oh!! So thats the cross thing? Not that hard, thank you so much!! All of them are alike!! haha, thanks so much!!|dw:1355342436738:dw|
anonymous
  • anonymous
you're welcome.

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