#How to solve this? If y varies as x, and x=9 when y=15, then the value of y when x=33

54 messages · Page 1 of 1 (latest)

red breach
forest charmBOT
inner shoal
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what do you mean by "y varies as x"?

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have a feeling you're missing the key word there

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does it say "varies directly as x" or "varies inversely as x"?

red breach
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Directly

inner shoal
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right

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then y = kx, where k is a constant independent of x and y.

red breach
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ok

red breach
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?

inner shoal
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was this a blind guess or do you have some calculations to back it up?

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also, in the future, put the question in the body, and leave the title with the topic that the question falls under, in your case something like "Direct and Inverse Variation"'

red breach
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ok

red breach
inner shoal
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show them!

red breach
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ok

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x=9, y=15

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=15/9

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then it says 33

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so 15/9 x 33

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=55

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(or)

inner shoal
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also don't use the letter x for multiplication

red breach
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x to the raise of 1 by y to the raise of 1

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=

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x to the raise of 2 by y to the raise of 2

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thats how i did it

red breach
inner shoal
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"to the raise of"?

red breach
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means power

inner shoal
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why would you raise x or y to any powers here??

red breach
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its the formula

inner shoal
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...do you by any chance mean $$\frac{x_1}{y_1} = \frac{x_2}{y_2}?$$

thick lotusBOT
red breach
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yeah

inner shoal
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those are SUBSCRIPTS not superscripts. and they do NOT mean raising to a power.

red breach
red breach
inner shoal
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right, but you are communicating things in a confusing way

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so you used the formula x_1/y_1 = x_2/y_2

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yeah that's fine

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not exactly what i was hoping you'd go for but it works just fine

red breach
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yeah

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can you clarify an another doubt

inner shoal
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...sure, while we're at this

red breach
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the question is....

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The ratio of five dozen balls to 16 balls

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?

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what is it

inner shoal
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what's your doubt about this one?

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@red breach is there a part of this problem that you don't understand?

keen oracle
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.close