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Mathematics 8 Online
OpenStudy (anonymous):

Point C is located at (1, 2), and point D is located at (−4, −2). Find the y value of the point that is the distance from point C to point D. 1 0 1.5 2.25

OpenStudy (anonymous):

@jdoe0001 @ParthKohli

OpenStudy (jdoe0001):

that is the distance ^ sorta blank there

OpenStudy (jdoe0001):

but I assume you know how to, if it's a ratio, will be the same as before

OpenStudy (anonymous):

Yes, but I got a very different answer than my answer choices. That is why I think I did something wrong.

OpenStudy (anonymous):

@TechnoSoul Help?! lol

OpenStudy (jdoe0001):

you know you're still missing info in the posting " that is the distance" ^?

OpenStudy (anonymous):

https://www.desmos.com/calculator/jvq7bn3mkh

OpenStudy (anonymous):

OpenStudy (anonymous):

plug in your points and youll get your distance

OpenStudy (anonymous):

Oh, that's what you meant. well there is no distance, just added space by accident.

OpenStudy (anonymous):

@jdoe0001 1/4 LOL sorry

OpenStudy (anonymous):

And @TechnoSoul that formula wont get my the y value

OpenStudy (anonymous):

ya but it will get your distance

OpenStudy (anonymous):

so what do I do for the 1/4 then? @TechnoSoul

OpenStudy (anonymous):

are you asking for the midpoint formula possibly?

OpenStudy (anonymous):

@jdoe0001 I thought it wasn't anything, but then I figured I was missing the 1/4 lol

OpenStudy (anonymous):

because that will give you a y value

OpenStudy (jdoe0001):

well, just plug in your values, like before notice that is 1/4 from C to D so say that point P, will make CP ratio1=1 and PD ratio2=4

OpenStudy (anonymous):

https://www.desmos.com/calculator/23mzpdzfgp

OpenStudy (anonymous):

Yeah hold on, let me show you what I did @jdoe0001

OpenStudy (anonymous):

the midpoint is (-3/2, 0) making your y value 0

OpenStudy (anonymous):

and that is an option

OpenStudy (anonymous):

hold on im drawing it @jdoe0001

OpenStudy (anonymous):

|dw:1402443604826:dw|

OpenStudy (anonymous):

This is how I plugged my numbers in and solved only the right part which wold give me the y value

OpenStudy (anonymous):

@jdoe0001

OpenStudy (anonymous):

which equation are you using in that drawing?

OpenStudy (anonymous):

I'm not sure which one it is, but it is one that @jdoe0001 showed me in last question I asked, so I'm just substituting numbers

OpenStudy (jim766):

\[d=\sqrt{(x-x)^{2}+(y-y)^{2}}\]

OpenStudy (anonymous):

and that would give the y value? @Jim766

OpenStudy (jdoe0001):

I think you got the ratios... a bit mixed up... one sec

OpenStudy (anonymous):

alrighty @jdoe0001

OpenStudy (anonymous):

I would recommend using the midpoint formula instead, do you know it?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

Try to plug your values into this equation instead.

OpenStudy (anonymous):

by doing so you will get a y value of 0

OpenStudy (anonymous):

0 was wrong :(

OpenStudy (anonymous):

Can I just ask a different question now? if anyone can help me please

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