Friend of Kim

182 reputation

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visits	member for	1 year, 6 months
	seen	May 2 at 21:34
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	182 reputation	bio	website		visits	member for	1 year, 6 months
7 badges		location			seen	May 2 at 21:34

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May 14	accepted	Why does $\binom{10}{7} = \frac{10!}{(10-7)!7!}$
May 14	revised	Why does $\binom{10}{7} = \frac{10!}{(10-7)!7!}$ added 36 characters in body
May 14	awarded	Commentator
May 14	comment	Why does $\binom{10}{7} = \frac{10!}{(10-7)!7!}$ Is my question clear, do you see what I'm asking?
May 14	comment	Why does $\binom{10}{7} = \frac{10!}{(10-7)!7!}$ @Gigili I think I learned it now by looking at your edit. Thanks!
May 14	revised	Why does $\binom{10}{7} = \frac{10!}{(10-7)!7!}$ deleted 4 characters in body
May 14	reviewed	Approve suggested edit on Why does $\binom{10}{7} = \frac{10!}{(10-7)!7!}$
May 14	comment	Why does $\binom{10}{7} = \frac{10!}{(10-7)!7!}$ @Gigili Sorry, but I don't know LaTeX...
May 14	comment	Why does $\binom{10}{7} = \frac{10!}{(10-7)!7!}$ 10C7 can be written as (10x9x8x7x6x5x4)/(7x6x5x4x3x2x1) to find how many ways 7 "correct" can happen out of 10 trials. But, why? Why can you write it like that? It's a poor example, but 5^2x5^3=5^3+2=5^5 because 5x5 x 5x5x5 = 5^5... X^n x X^m = X^n+m. It's a rule that works, but why does this rule about 10C7 work?
May 14	asked	Why does $\binom{10}{7} = \frac{10!}{(10-7)!7!}$
Dec 12	awarded	Scholar
Dec 12	comment	Solving Linear Equation in One Unknown I know, they are! I didn't realize that it was one term, so it got -3 instead of +3. Thanks everyone!
Dec 12	accepted	Solving Linear Equation in One Unknown
Dec 12	comment	Solving Linear Equation in One Unknown Thanks, but 12x-3x, then you wrote -3, why isn't it +3? it says x+1 and not -1. Hopefully this is where I left of. Edit: Is x+1 one term? So it's like -(x+1) = -x-1 to remove the brackets?
Dec 12	awarded	Editor
Dec 12	comment	Solving Linear Equation in One Unknown Added a picture
Dec 12	revised	Solving Linear Equation in One Unknown added 174 characters in body
Dec 12	asked	Solving Linear Equation in One Unknown
Nov 20	comment	Recipe for solving equations In UK English it's called lower secondary school. I mean the equations you learn there.
Nov 20	comment	Recipe for solving equations I think I have formulated myself poorly. I was asking if anyone knew about a recipe for solving all middle school algebra equations.