JJROCKER wrote:
Harakou wrote:
Yes, it would be 1,600. Would you be able to solve something like this?
(4(x + 5))/6 = 2025 right? I was a little confused on how to do it though. Do you think you could explain it step by step?
Yep. Step by step:
(4(x + 5))/6 = 20
6((4(x + 5))/6) = 20(6) Multiply both sides by 6.
4(x + 5) = 120 Simplify.
4(x) + 4(5) = 120 Distribute the 4 to both addends within the parentheses.
4x + 20 = 120 Simplify.
4x + 20 - 20 = 120 - 20 Subtract 20 from both sides.
4x = 100 Simplify.
4x/4 = 100/4 Divide both sides by 4.
x = 25 Simplify.
*Yawn* I'd love to stay up some more and discuss math, but I really have to go to bed. 'Night.
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JJROCKER wrote:
Harakou wrote:
JJROCKER wrote:
Thats good.What about you?
Now I am a little embarrassed but I am starting Algebra I
Hey, so am I!
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bbbeb wrote:
I got one.
Solve this, smart ones.
3x^2+4x+7=0
x=-4±√(-68)/6
Last edited by scratcher7_13 (2011-06-06 09:53:37)
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I know factorials.
1! = 1.
2! = 2.
3! = 6.
4! = 24.
5! = 120.
6! = 720.
7! = 5040.
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scmb1 wrote:
Anyone here do calc? If so, I have a joke:
∫1/cabin*dcabin
natural Log cabin + sea
heheheheheheh
Old joke
EDIT: I'm not to calculus yet, just Adv. Trig, but that's one away, so I knew this joke from my friend badger, who is a year older and ahead
Last edited by echs (2011-06-06 17:10:41)

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Here's a word problem for ya (if you've seen it before don't give it away, por favor):
There are 1000 shut doors in a really long hall and 1000 kids in a line. The first kid goes by and opens every door. The 2nd kid closes every other door (door 2,4,6, etc.) The 3rd kid goes to every 3rd door (3, 6, 9...) and closes the ones that are open and opens the ones that are closed.The 4th kid goes to every 4th door and does the same. You get the point.
This continues until every kid has gone. When it's all over, what doors are open?
Note: This is not one of the trick question word problems, so don't get too clever. (For instance the answer is not "None- the wind blew them shut.")
Note #2: The math here doesn't have to be too complex. I did it before I had any algebra.
Note #3: If you Google (or Bing or Yahoo or whatever) this problem, don't say anything.
Last edited by scmb1 (2011-06-06 19:01:29)
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scmb1 wrote:
Here's a word problem for ya (if you've seen it before don't give it away, por favor):
There are 1000 shut doors in a really long hall and 1000 kids in a line. The first kid goes by and opens every door. The 2nd kid closes every other door (door 2,4,6, etc.) The 3rd kid goes to every 3rd door (3, 6, 9...) and closes the ones that are open and opens the ones that are closed.The 4th kid goes to every 4th door and does the same. You get the point.
This continues until every kid has gone. When it's all over, what doors are open?
Just the 1000th?

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scmb1 wrote:
Here's a word problem for ya (if you've seen it before don't give it away, por favor):
There are 1000 shut doors in a really long hall and 1000 kids in a line. The first kid goes by and opens every door. The 2nd kid closes every other door (door 2,4,6, etc.) The 3rd kid goes to every 3rd door (3, 6, 9...) and closes the ones that are open and opens the ones that are closed.The 4th kid goes to every 4th door and does the same. You get the point.
This continues until every kid has gone. When it's all over, what doors are open?
Note: This is not one of the trick question word problems, so don't get too clever. (For instance the answer is not "None- the wind blew them shut.")
Note #2: The math here doesn't have to be too complex. I did it before I had any algebra.
Note #3: If you Google (or Bing or Yahoo or whatever) this problem, don't say anything.
I am too lazy (\_/)

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scmb1 wrote:
Here's a word problem for ya (if you've seen it before don't give it away, por favor):
There are 1000 shut doors in a really long hall and 1000 kids in a line. The first kid goes by and opens every door. The 2nd kid closes every other door (door 2,4,6, etc.) The 3rd kid goes to every 3rd door (3, 6, 9...) and closes the ones that are open and opens the ones that are closed.The 4th kid goes to every 4th door and does the same. You get the point.
This continues until every kid has gone. When it's all over, what doors are open?
Note: This is not one of the trick question word problems, so don't get too clever. (For instance the answer is not "None- the wind blew them shut.")
Note #2: The math here doesn't have to be too complex. I did it before I had any algebra.
Note #3: If you Google (or Bing or Yahoo or whatever) this problem, don't say anything.
I got that the open doors were the squares of the numbers 1-31. (So 1, 4, 9, 16, and so on.)
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Harakou wrote:
scmb1 wrote:
Here's a word problem for ya (if you've seen it before don't give it away, por favor):
There are 1000 shut doors in a really long hall and 1000 kids in a line. The first kid goes by and opens every door. The 2nd kid closes every other door (door 2,4,6, etc.) The 3rd kid goes to every 3rd door (3, 6, 9...) and closes the ones that are open and opens the ones that are closed.The 4th kid goes to every 4th door and does the same. You get the point.
This continues until every kid has gone. When it's all over, what doors are open?
Note: This is not one of the trick question word problems, so don't get too clever. (For instance the answer is not "None- the wind blew them shut.")
Note #2: The math here doesn't have to be too complex. I did it before I had any algebra.
Note #3: If you Google (or Bing or Yahoo or whatever) this problem, don't say anything.I got that the open doors were the squares of the numbers 1-31. (So 1, 4, 9, 16, and so on.)
WOW. How did you figure that out?

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JJROCKER wrote:
No actually, I was not thinking of that and 3+0 does not equal thirty. Maybe on another planet like Derp but not on Earth.
Planet Derp?
JJROCKER wrote:
Harakou wrote:
scmb1 wrote:
Here's a word problem for ya (if you've seen it before don't give it away, por favor):
Note: This is not one of the trick question word problems, so don't get too clever. (For instance the answer is not "None- the wind blew them shut.")
Note #2: The math here doesn't have to be too complex. I did it before I had any algebra.
Note #3: If you Google (or Bing or Yahoo or whatever) this problem, don't say anything.I got that the open doors were the squares of the numbers 1-31. (So 1, 4, 9, 16, and so on.)
WOW. How did you figure that out?
Just whipped up a little script in Scratch. This is a programming website, isn't it?
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5*4*3*2*1=120
Used for determining stuff like how many ways people can finish in a race and stuff like that.

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Harakou wrote:
JJROCKER wrote:
Harakou wrote:
I got that the open doors were the squares of the numbers 1-31. (So 1, 4, 9, 16, and so on.)WOW. How did you figure that out?
Just whipped up a little script in Scratch. This is a programming website, isn't it?
![]()
Clever...
Now, does anyone know how to do it using just paper and pencil (and maybe a non-programmable calculator)?
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