## katiebugg 3 years ago solve

1. lgbasallote

sure

2. katiebugg

$c _{18 12}$

3. lgbasallote

?

4. best.shakir

c=0

5. lgbasallote

judging from your past questions...this has something to do with arithmetic/geometric sequence?

6. lgbasallote

is that a wolfram answer again?

7. katiebugg

yeah it does

8. ash2326

@katiebugg Please don't post a new question until you are done with your previous one. Thanks :)

9. katiebugg

10. lgbasallote

i still dont get what this question means...and why the heck do people LOVE attaching "thanks" at the end of their statements o.O

11. katiebugg

i dont get it eaither... the question that is

12. ash2326

@katiebugg I can see that you've posted similar questions. Did you understand the concepts involved?

13. ash2326

@lgbasallote to sound polite thanks:)

14. katiebugg

kinnda butt not really been upp all night doing this soooo

15. lgbasallote

dont use it on me -_- it creeps and freaks me out

16. katiebugg

hahaha

17. lgbasallote

@katiebugg are there any other conditions or phrases that come along with the question?

18. ash2326

@katiebugg it's better to take rest now and start afresh tomorrow.

19. katiebugg

nope juse evaluate

20. katiebugg

and this has to bee done 2mrw sooo

21. lgbasallote

can you write it in bigger text?

22. katiebugg

its a C then 18 and 12

23. lgbasallote

but where are 18 and 12..beside C? below C? some of the placements are VERY important

24. katiebugg

umm subscripts

25. ash2326

@katiebugg are you learning combinations?

26. katiebugg

yess!!!!!!

27. lgbasallote

OH...that makes more sense =_=

28. katiebugg

sorry

29. lgbasallote

$\huge nCr = \frac{n!}{r!(n-r)!}$ does that help?

30. katiebugg

ahhhhhhhh!!!!!!!! no

31. lgbasallote

for example $3C2 = \frac{3!}{2!(3-2)!}$

32. lgbasallote

now does it help?

33. katiebugg

this is last one then get to go to bed and no ima still lost :(

34. lgbasallote

here's another one... $12C10 \implies \frac{12!}{10!(12-10)!} \implies \frac{12!}{10!2!} \implies \frac{12 \times 11 \times \cancel{10!}}{\cancel{10!} 2!} \implies \frac{12 \times 11}{2 \times 1}$ does that help?

35. katiebugg

how do i know were the 18 and the 12 go

36. lgbasallote

the bigger one is always in the numerator

37. lgbasallote

that's just how i remember it heh

38. katiebugg

k thaks!!!!!!!!

39. lgbasallote

welcome ^_^

40. lgbasallote

spamming random examples of solutions really does help huh...

41. katiebugg

:( no i got like the first step and now ima lost

42. lgbasallote

oh btw....you're online schooled right?

43. katiebugg

just for summer i wanted to jump ahead soo i took a class

44. lgbasallote

hah i knew it..i could tell based on the random jumping of topics haha lol...anyway back to your question

45. lgbasallote

what did you get for the first step?

46. katiebugg

umm 18/12(6)

47. lgbasallote

hmmm you do mean $\frac{18!}{12!6!}$ right?

48. katiebugg

and u watchin my questions hahah creeper :P and yess

49. lgbasallote

the exclamation points are very crucial...

50. lgbasallote

heh it's my avatar duty :p

51. katiebugg

love that show ahahaha

52. lgbasallote

okay here's a hint for you $\small 18! \implies 18 \times 17 \times 16 \times 15 \times 14 \times 13\times 12 \times 11 \times 10 \times 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1$ $12! \implies 12 \times 11 \times 10 \times 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1$ $6! \implies 6 \times 5 \times 4 \times 3 \times 2 \times 1$ does that help?

53. katiebugg

just told me what the !!! do right

54. lgbasallote

hmm?

55. lgbasallote

okay here's another hint $\large \frac{18!}{12! 6!} \implies \frac{18 \times 17 \times 16 \times 15 \times 14 \times 13 \times 12!}{(12!)(6!)}$ does that help more?

56. lgbasallote

look for something you can cancel..

57. katiebugg

and then

58. lgbasallote

cancel the cancellable

59. katiebugg

ok i think