what is 2's complement?
92237
well, I don't know if you mean how do you calculate 2's complement or what is it, so here goes.  A 2's complement is a  way of converting binary numbers that makes subtraction easy/easier.  If you have 2 numbers, X and Y and want to subtract Y from X, you can just add the 2's complement of Y to X (discarding any end carry digit) and you'll have your answer.  For example, if X is 1010100 (84) and Y is 1000011 (67), the 2's complement of Y is 0111101, so if we add:\n\n1010100 + 0111101 = 10010001 which has a left carry digit of 1 so we discard that, and the answer is 0010001 (17).  Obviously, 84-67=17 so it works.\n\nNow, how do you find 2's complement, it's pretty easy, you start from the right and work your way to the left on the digits.  You leave all the 0's you come to as 0's until you encounter the first 1, which you leave as a 1.  From the next digit to the left until the end, you simply flip 0's for 1's and 1's for 0's.  Back to our example of X and Y above, the 2's complement of Y=1000011:\n\nfirst (rightmost) digit is a 1, so leave it alone.  All digits to the left of this will be inverted. = 1\n\nNext digit is a 1, so we make it a 0\nNext is a 0, make it a 1\nnext another 0, make it a 1\nnext another 0, make it a 1\nnext another 0, make it a 1\nLast is a 1, make it a 0\n\nSo, our 2's complement is 0111101 just as above.\n\nFor practice, let's look at X from above which is 1010100\n\nFirst digit (from right) is a zero, leave alone = 0\nNext is another zero, leave alone = 0\nnext is a 1, first 1, leave alone = 1\nnext is a 0, invert = 1\nnext is a 1 invert = 0\nnext is a 0 invert = 1\nnext is a 1 invert = 0\n\nso the 2's complement of 1010100 is 0101100.\n\nHope this helps.
958343
you evil Troll! You asked a trick question!\n\n(half of 2) plus 2=3\n            -BUT-\nhalf of (2 plus 2)=2
1048168
dont know?   2 points!!
388708
Besause when you multiply two numbers you are actually performing an addition, for example:\n\n2(-2) or 2*-2 What this means is that you have to add -2 twice: (-2)+ (-2) which = -4\n\nwhen the multiplication is -2(2) you are to take away 2 two times (subtract): -(2)-(2) = -4
805124
Read about one's complement addition here --> http://mathforum.org/library/drmath/view/54379.html
443662
A three dimensional coordinate (point in space) reads (x,y,z).\nSo, (1,2,-2) = (x,y,z) clearly implies that x=1, y=2, and \nz= -2, as you required.
1026299
becuz i want 2 points
51458
When two angles are supplementary, their sum is 180 degrees.  For example:\n\na + b = c\n100 + 80 = 180, therefore a and b are supplementary.\n\nIf a + b = 90, the angles are complementary.
237611
DeMorgan's Law states that:\nc(A)∩c(B)=c(A∪B) and c(A)∪c(B)=c(A∩B)  (c(x) means the complement set of X)\n\nSupposing that the universal set is {a, b, c, d, e, f, g, h, i},\nc(A)∩c(B) = {b, i},\nc(A∪B)    = {b, i},\nc(A)∪c(B) = {a, b, d, e, f, h, i}, and\nc(A∩B)    = {a, b, d, e, f, h, i},\nso the law is verified. Note that this does not prove the law.
976722
Its C and B\n\nBut if you couldn't figure this out, you'll never get past English Two (that is if you even pass English One).
1038610
1st one is D, 2nd is A.
316885
A pair of angles are supplementary if their respective measures sum to 180 degrees.\n\nYou would subtract an angle less than 180 to get it's supplement.
43631
The first part  is (c) either true or false.\nThe second part is also (c)
144641
MgC(2)... the 2 is supposed to be subscript.
950488
Mg3P2\n\nthe three and the two are subscripts
218316
Thats funny.  Tell me another one.\n\nMaybe its like 5-2=2\n\n\nlol
38073
Beats me. He's ^ probably right. I'll just take my 2 points for answering. Thank you.