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anonymous
 one year ago
Suppose y varies directly with x, and y=20 when x= 5. Find x when y=24.
anonymous
 one year ago
Suppose y varies directly with x, and y=20 when x= 5. Find x when y=24.

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Can you help me? I'm stuck

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2\[y = kx\] is the form for direct variation of \(y\) with \(x\) we know a pair of values for \(x,y\), so use that to find the value of \(k\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Alright. So it would be 20=k*5?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay. So what do I do now? I find K?

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2yes, what value of \(k\) will make that work? once you know \(k\), you plug your new value of \(y\) or \(x\) into the equation and find the missing value

freckles
 one year ago
Best ResponseYou've already chosen the best response.0y=4x is the equation you have remember your question ask you to find x when y is 24.

freckles
 one year ago
Best ResponseYou've already chosen the best response.0so solve for x when y is 24...

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2exactly. \[y=4x\]\[24=4x\]\[x=\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I'm not understanding this part.

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2seems almost too easy, doesn't it? :)

whpalmer4
 one year ago
Best ResponseYou've already chosen the best response.2You knew that the two were related by direct variation, so that established the \(y = kx\) formula. You knew a pair of values, so that established the value of \(k\). Now you can find the corresponding value to any value of \(x\) or \(y\).

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay. Thank you. This has helped a lot.
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