combine and simplify?
360169
go to your local library and see if they subscribe to tutor.com they are also called live homework help. they are available between 2 and 10 pm.
258833
(defun flatten (lst)\n (cond\n  ((null lst) nil)\n  ((atom lst) (list lst))\n  ('t (append (flatten (car lst)) (flatten (cdr lst))))))
416538
If you are adding to variables,and they are considered to be independent, then the proper SD would be\nsqrt(SD1^2 + SD2^2).  \nSo, square both SD's, add them together, and then take the square root.  That would be the SD of the sum.  If they are not independentm then the SD is \nsqrt(SD1^2 + SD2^2 + 2COV(N1,N2)).\n\nNow if you are saying that you have two groups and you want to combine them and find the SD to the entire list, then there is no short cut; you would have to recompute the SD.  But I don't think that is what you are asking.
939247
No, but you can work it out on paper. I know because I did it once. You have five letters, so there should be 25 combinations, Of course, as two letters are the same that would make it 20. I think. Just give it a go. It's always more fun to work these tings out yourself.
217638
simple answer, no.\ncomplex answer, yes.\n\nbut it is not simple, too many hoops, and you dont know if you are over-priting.\n\nbest to find another solution besides user tagging.
967368
Just treat all other letters as constants. You can multiply, divide, add and subtract both sides of an equation and maintain the equality.
604893
seperate them into 4s then count them as 1 dollar
488992
hi,\nwhat you can do merge coulmn a,b,c for rows you want only one column. and below it you will get three columns as u want
318310
take the percent number and put it over 100. then simplify
939729
Just "pair up" the terms.\n\n1 + (5-3) + (9-7) + (13-11) + ... + (2001-1999)\n\n1 + 2 + 2 + 2 + .... + 2 = 1 + 2 * 500 = 1001
118308
Add all sides together
791300
Use the FOIL method; First, Outer, Inner, Last.\n\nFirst, n * n\n\nOuter, n * 5\n\nInner, n * 7\n\nLast 7 * 5.\n\nThen add them all together.\n\n22 NOV 06, 0420 hrs, GMT.
751280
multiplication\n\n\nDoug
352910
yeeaaahhh....Mix 'em!!!  YYUUUMMMMMMYYYYYY!!!!!!!!!!!\n\n:)  :)
663777
SOrry, I can't help you. If I had the formulas I could do it, but there is no way I remember that off the top of my head! Good luck
165476
How about (a+c)/(b+d)  ? more interesting!!\n\nbtw this only work when a/b != c/d
221530
Add them together and divide by 5.\n\nWow. I could seriously have you people do my homework for me. Every night. I'll type out the problems and see how you all do. :P JP