#Direct proportion

41 messages · Page 1 of 1 (latest)

upbeat ore
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g = k(root(h))
18 = k(root(16))
18 = 4k

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Solve for k

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And then use g = 2 to form a new equation where you need to solve for h

patent geode
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k = 4.5 correct?

upbeat ore
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Yh

patent geode
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Right

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Could you guide me to how I would go from 4.5 to 2?

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wait oh

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Nevermind s

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Thanks.

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Alright so I have that now

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Now I'm stuck

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Do I divide by 9

upbeat ore
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2 = 4.5[rt(h)]
2/4.5 = rt(h)
4/9 = rt(h)
16/81 = h
I believe that’s how you’d do it

patent geode
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What does rt mean?

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Root?

upbeat ore
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Yh

patent geode
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Wait how does 2/4.5 = 4/9 btw?

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Did you mean 9/4?

upbeat ore
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2/4.5
Double them both
4/9

patent geode
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Oh.

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Sorry btw my wifi went out for like 8 minutes.

patent geode
upbeat ore
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With fractions u don’t have decimals in them and when it’s like that it was easier for me to square it

patent geode
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Oh yea I forgot

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Alright

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Final question probably, if it had 16/81 as the specific answer why does it ask to "Find the possible values of h when g=2"

upbeat ore
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Idk do u not have the mark scheme?

patent geode
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For some reason no

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He didn't upload it even though it's revision work.

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Just tried looking, not even on the mathsgenie website.

upbeat ore
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Damn

marsh dock
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Isn’t it 3

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Because u want the square root of H by itself

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So u do 2x4.5

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And u get 9

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Then square root it

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So it’s either +3 or -3

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Nvm ignore me

upbeat ore
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Wdym

placid zealot