Find the value of y for a given value of x, if y varies directly with x.
If y = 240 when x = 48, what is y when x = 46?
Answer
–230
9.2
230
–9.2
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OpenStudy (schrodinger):
Is this a test question?
OpenStudy (anonymous):
no.
OpenStudy (schrodinger):
What's with the a.c.b.d format?
OpenStudy (anonymous):
the ratio of y to x is 5 to 1 so for each value of x y=5x
OpenStudy (anonymous):
i do not know....@Schrodinger ....
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OpenStudy (schrodinger):
Lol. Well you're posting this like a test question or like a homework problem. That's why i'm asking.
OpenStudy (anonymous):
Lol ....
OpenStudy (schrodinger):
?
OpenStudy (anonymous):
Its not a test question , but do you know how to answer it?
OpenStudy (schrodinger):
Yeah. A direct variation is like this: y = kx, in this situation, 240 = k(48) for the first one. In this situation, divide by 240 by 48 in order to find what k is. This should remain constant while x and y might change.
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OpenStudy (schrodinger):
That said, plug it in for the same thing. Once you find the value of k, plug it into y = kx (with x being 46 this time rather than 48.) That should be your answer.)