Friend of Kim
Reputation
Next privilege 250 Rep.
 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 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. Nov 20 comment Recipe for solving equations @AngelaRichardson What do you mean? Nov 20 comment Recipe for solving equations It should work for all equations you can find in a middle school math book. I can do the programming here, the question is the mathematics. I want to make a script that do everything like a human would have done it. This is because I want it to show the steps for solving the equation. Nov 20 awarded Student Nov 20 asked Recipe for solving equations