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Munchor
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« on: 15 February, 2011, 23:15:04 » |
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In portuguese, we have something called 'Regra de 3 Simples', and I'd like to know what it is called in English:
1 - 4
2 - x
x = (2*4)/1
x = 8
It's used in direct proportions, what's it called, do you have a name for it?
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« Last Edit: 16 February, 2011, 21:55:06 by Scout »
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Happybobjr
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« Reply #1 on: 15 February, 2011, 23:19:53 » |
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Do you mean x=4?
If so i think you mean cross-multiplying.
Side note: Is the irc down?
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Fast Crash
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« Reply #2 on: 15 February, 2011, 23:31:45 » |
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Yes the irc is down
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graphmastur
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« Reply #3 on: 16 February, 2011, 04:48:34 » |
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Cross multiplying is what it is called, yes. And x does in fact equal 8, it's just that he did x=(2*4)/2 when it should have been x=(2*4)/1. He knew what he was doing, he just didn't. ;-)
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Happybobjr
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« Reply #4 on: 16 February, 2011, 05:04:01 » |
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Opps, only looked at the last parts.
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PeonHero
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« Reply #5 on: 16 February, 2011, 05:21:45 » |
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Cross multiplying was such an easy topic in school, easy on the calculator too.
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apcalc
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« Reply #6 on: 16 February, 2011, 05:23:35 » |
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To confuse people, I always like saying, "Solve using the fact that the product of the means is equal to the product of the extremes"  |
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« Last Edit: 16 February, 2011, 05:23:46 by apcalc »
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Munchor
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« Reply #7 on: 16 February, 2011, 21:55:24 » |
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"Cross multiplying" Thanks  |
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