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January 01, 2026, 10:25:30 am
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Author Topic: Silly Questions Thread  (Read 33202 times)  Share 

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the.watchman

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Re: Silly Questions Thread
« Reply #45 on: February 05, 2010, 10:17:34 pm »
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Quote from: Aqualim on February 05, 2010, 10:12:38 pm
Quote from: Stroodle on February 05, 2010, 06:55:53 pm
The second part of the hybrid function should be C=0.50n-45 where n is greater than 150.


Edit* there's different ways to get this. I prefer to do it by solving the equations 30=150x+y and 31=152x+y

Ok you've lost me, wouldn't you expect the +b to just be the fixed charge?

No, because it is 50 cents a call ONLY FROM n=150

Therefore, we need to find the second line with a gradient of 0.5 and which goes through (150,30)
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Aqualim

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Re: Silly Questions Thread
« Reply #46 on: February 05, 2010, 11:46:14 pm »
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Quote from: the.watchman on February 05, 2010, 10:17:34 pm
Quote from: Aqualim on February 05, 2010, 10:12:38 pm
Quote from: Stroodle on February 05, 2010, 06:55:53 pm
The second part of the hybrid function should be C=0.50n-45 where n is greater than 150.


Edit* there's different ways to get this. I prefer to do it by solving the equations 30=150x+y and 31=152x+y

Ok you've lost me, wouldn't you expect the +b to just be the fixed charge?

No, because it is 50 cents a call ONLY FROM n=150

Therefore, we need to find the second line with a gradient of 0.5 and which goes through (150,30)

ahh ok, makes sense now, wouldn't have thought to go that far to work it out. Was thinking it was just a matter of substitution.

Thanks for helps guys :)
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the.watchman

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Re: Silly Questions Thread
« Reply #47 on: February 06, 2010, 09:38:36 am »
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No problem!
What I find helps is to try to visualise the situation (eg. fixed charge THEN 50cents a call from 150 calls onwards)
Then you can see what is obviously incorrect and what answers can be automatically discarded
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Christiano

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Re: Silly Questions Thread
« Reply #48 on: February 07, 2010, 10:11:19 pm »
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Man holidays do suck .. You forget everything you learnt..

Need help with this: A line has a gradient of 6 and pass through the points with coords (-1, 6) and (7, a). Find the value of a.

How do you go about doing this? I got like 10 more similar questions after this!
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the.watchman

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Re: Silly Questions Thread
« Reply #49 on: February 07, 2010, 10:13:21 pm »
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For the gradient: ,

I know the feeling! :)
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Christiano

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Re: Silly Questions Thread
« Reply #50 on: February 07, 2010, 10:14:37 pm »
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Thanks  ;D
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the.watchman

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Re: Silly Questions Thread
« Reply #51 on: February 07, 2010, 10:15:43 pm »
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Re: Silly Questions Thread
« Reply #52 on: February 07, 2010, 10:31:14 pm »
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OH EM GEE  >:(

Line has a gradient of -6 and passes through the points with coords (1,6) and (7,a). Find value of a

How does the answer become !!  :-\

EDIT: Sorry its actually gradient of -6 and passes through the cords (1,6) and (b,7). Find value of b
« Last Edit: February 07, 2010, 10:44:25 pm by Christiano »
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the.watchman

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Re: Silly Questions Thread
« Reply #53 on: February 07, 2010, 10:35:33 pm »
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Well, , ,

How on earth did the book get ?!?!
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superflya

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Re: Silly Questions Thread
« Reply #54 on: February 07, 2010, 10:59:49 pm »
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the easy things are hard for watchman :P
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the.watchman

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Re: Silly Questions Thread
« Reply #55 on: February 08, 2010, 06:23:07 am »
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superflya, I didn't see the edit, so yes I can do this question (I think ... :P)
« Last Edit: February 08, 2010, 07:16:31 am by the.watchman »
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Re: Silly Questions Thread
« Reply #56 on: February 08, 2010, 05:12:31 pm »
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Quote from: the.watchman on February 08, 2010, 06:23:07 am
superflya, I didn't see the edit, so yes I can do this question (I think ... :P)

lol my bad.
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the.watchman

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Re: Silly Questions Thread
« Reply #57 on: February 08, 2010, 05:14:55 pm »
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Quote from: superflya on February 08, 2010, 05:12:31 pm
Quote from: the.watchman on February 08, 2010, 06:23:07 am
superflya, I didn't see the edit, so yes I can do this question (I think ... :P)

lol my bad.

I'm offended... >:(
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Aqualim

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Re: Silly Questions Thread
« Reply #58 on: February 08, 2010, 10:53:01 pm »
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Something isn't right here.. Asymptotes are wrong, but don't know why
Express as

and I got
Then from there I got the two asymptotes which I think are; and

But they don't lie within the graph, well atleast not horizontally. (don't know how to draw a straight line vertically on the TI-Nspire calculator)
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TrueTears

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Re: Silly Questions Thread
« Reply #59 on: February 08, 2010, 10:53:45 pm »
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did you long divide it properly heh xD you shouldn't get another polynomial as the numerator.
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