darknesz
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| Joined: 24 Sep 2008 |
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Khrusos
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| Joined: 02 Aug 2011 |
| Total Posts: 2971 |
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| 20 Oct 2011 05:31 PM |
That is really impossible.
7 more days till my birthday! :D |
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smilex
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| Joined: 23 Sep 2008 |
| Total Posts: 21222 |
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| 20 Oct 2011 05:32 PM |
| you can't solve for x if there isn't a specific y value to use. |
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solarbot
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| Joined: 18 Oct 2011 |
| Total Posts: 47 |
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BobCowMan
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| Joined: 14 May 2010 |
| Total Posts: 22634 |
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| 20 Oct 2011 05:33 PM |
I would get my Inspire out but I'm too lazy
~MOOOOlah 3:8~ |
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cyrus828
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| Joined: 05 Jul 2008 |
| Total Posts: 514 |
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solarbot
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| Joined: 18 Oct 2011 |
| Total Posts: 47 |
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| 20 Oct 2011 05:34 PM |
| Bob you almost have 7777 Posts :D |
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| 20 Oct 2011 05:34 PM |
Smile, didnt you learn algebra (learned it last year, im in GEM, 2 grades ahead math)
f(X)=Y. Hes talking about a function of a graph for some reason |
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Merely
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| Joined: 07 Dec 2010 |
| Total Posts: 17266 |
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| 20 Oct 2011 05:35 PM |
x is whatever you make it
f(x) = | 7x - 10 |
f(x) is the function. x is the independent variable you manipulate to get the result y or f(x) |
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darknesz
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| Joined: 24 Sep 2008 |
| Total Posts: 12712 |
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| 20 Oct 2011 05:36 PM |
Oh forgot. Find the critical number of the function.
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nicksword
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| Joined: 18 Apr 2008 |
| Total Posts: 10588 |
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smilex
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| Joined: 23 Sep 2008 |
| Total Posts: 21222 |
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| 20 Oct 2011 05:36 PM |
| I'm in Pre-calc. He's asking for the x-value, which cannot be determined unless y, or f(x), is a defined number. It is impossible to solve for a variable if there are two unknowns. |
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Merely
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| Joined: 07 Dec 2010 |
| Total Posts: 17266 |
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| 20 Oct 2011 05:38 PM |
if x < 0 f(x) = -7x -10 else f(x) = 7x - 10
at x = 0 is the part where the graph bends (0, -10) |
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BobCowMan
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| Joined: 14 May 2010 |
| Total Posts: 22634 |
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| 20 Oct 2011 05:38 PM |
He could be asking where the line crosses the x-axis
~MOOOOlah 3:8~ |
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Merely
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| Joined: 07 Dec 2010 |
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| 20 Oct 2011 05:40 PM |
f(x) = | 7x - 10 |
it crosses the x axis at 10/7 |
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BobCowMan
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| Joined: 14 May 2010 |
| Total Posts: 22634 |
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| 20 Oct 2011 05:41 PM |
No, it would be around 1.5 or so
~MOOOOlah 3:8~ |
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| 20 Oct 2011 05:42 PM |
tell us what function of x is equal to then you can solve
#LMaD FTW! [[. i r kewl shufflar .]] -wwemaniac99 |
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BobCowMan
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| Joined: 14 May 2010 |
| Total Posts: 22634 |
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| 20 Oct 2011 05:42 PM |
Wait it's in absolute value sign
I forgot if you move right across the graph if you do that
So it might be 10, I'm not sure
~MOOOOlah 3:8~ |
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Merely
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| Joined: 07 Dec 2010 |
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| 20 Oct 2011 05:43 PM |
No. Plug in 10/7 for x.
f(x) = | 7x - 10 | f(x) = | 7(10/7) - 10 | f(x) = | 10 - 10 | f(x) = | 0 | f(x) = 0 y = 0
so the point is (10/7, 0) |
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BobCowMan
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| Joined: 14 May 2010 |
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| 20 Oct 2011 05:45 PM |
10/7 is 1.43 lol
I thought you said 10,7 at first and I was like O_e
But I think it might cross it at 10. If it does the same as when the -10 does in a parentheses, then it wouldn't go down it would go right
but then again I forgot if that's only if it's under a radical
So don't listen to me
~MOOOOlah 3:8~ |
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Monarky
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| Joined: 19 Oct 2011 |
| Total Posts: 203 |
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Merely
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| Joined: 07 Dec 2010 |
| Total Posts: 17266 |
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| 20 Oct 2011 05:47 PM |
| Well technically 10/7 =/= 1.43 but its an approximation of it |
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| 20 Oct 2011 05:48 PM |
| I'm in algebra 1 for the 2nd time >_< I hate it so much. I didn't even fail algebra last year. |
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| 20 Oct 2011 05:49 PM |
i in algebra 1 we just did absolute values i aced da test olololol
#LMaD FTW! [[. i r kewl shufflar .]] -wwemaniac99 |
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