can someone plug 19, 20, 21, 22, 23, 24 into the equation below for n and tell me what answers you get?
99457
-57810.99634\n-917631.9885\n-7796168.964\n-47036445.95\n-225614745\n-914061156
699210
Just plug in the numbers and solve for s...\ns=6^2-4^2\n    -----------\n       2(2)\ns=36-16\n     -------\n         4\n\ns=20/4\ns=5
909198
This question doesn't make sense.  There's no n in the equation.  n could be equal to anything.
291621
Sn = n(n+1)/2\nS = 25(25+1)/2\nS = 25*13 = 325
565039
For this you are asked to take the the equation y = 2n + 3 and substitute the rest of the values in for n and solve the equation. The implied operation between 2 and n is multiplication.\n\nSo you take the n out of the equation and put in the values that you have listed.\n\nFirst Value:\ny = 2(2) + 3  Do the multiplication first then add the 3\ny = 4 + 3\ny = 7\n\nSecond Value:\ny = 2(1/2) + 3\ny = 1 + 3\ny = 4\n\nThird Value:\ny = 2(0) + 3\ny = 3
729543
-24+w+8=4\n-24+24+w+8-8=4+24-8\nw=20\n\nhope this helps!
793036
19 + 7 = 26\n26 + 5 = 31\n31 + 3 = 34\n34 + 1 = 35\n35 + (-1) = 34
990622
if you know permutation/combination..the answer is easy to understand...\n\nlike 23C23+23C22+23C21+......+23C1
956461
factors of 24\n1, 2, 3, 4, 6, 8, 12, 24
986330
It's multiple choice, so all you really need to do is start plugging numbers in and see if they work:\ng(7) = 2(343) -11(49) + 8(7) + 21\ng(7) = 686 - 539 + 56 + 21 =/= 0\n\ng(1) = 2(1) - 11(1) + 8(1) + 21\ng(1) = 2 - 11 + 8 + 21 =/= 0\n\ng(7/2) = 2(343/8) - 11(49/4) + 8(7/2) + 21\ng(7/2) = 343/4 - 539/4 + 112/4 + 84/4 = 0\n\nThus, d is the right answer.
115650
--5 2 0 1 -----  F L O W\n--4 2 0 1 -----  B L O W\n--1 0 2 5 -----  W O L F\n-------------------------\n1 0 4 2 7 ----- N O B L E\n\nBut still N and W value are coming same...does this problem have solution. If you have then can you please send the answer to my mail id hssiddhu@yahoo.com
887594
Combine like terms, so n-2n = -n\n\nn - 2n = -14\n\n-n = -14\n\nn = 14\n\nPretty straightforward.  What part messed you up?  Let us know and I (we) will try to explain for you.\n\nNRT
710485
1 + (18-7n) = -9\nCombine 1 and 18\n19 - 7n = -9\nSubtract 19 from each side\n-7n = -28\nDivide both sides by -7\nn = -28/-7\nReduce\nn = 4
700653
Yes you're correct - just plug in -2 for x to get: \n \n20 - -6 + 1 = 27
487838
1) Assuming an aritmetic sequence\n\nbn = b1 + (n-1)d \nletting b3=a1 = 20, then b7=a5 = 32, and b25 = b23\na5 = a1 + (5-1)d\n32 = 20 + (5-1)d\n32 = 20 + 4d\n12 = 4d\n3 = d\n\nb25 = a23 = 20 + (23-1)*3\nb25 = 20 + 22*3\nb25 = 20 + 66\nb25 = 86\n=====================================================\n2)\na75 = a1 + (75-1)d; d=-3\n\na75 = 5 + (75-1)*-3\na75 = 5 + 74*-3\na75 = 5 + -222\na75 = -217\n\nSn = n/2(a1+an)\nS75 = 75/2(5 + -217)\nS75 = 75/2(-212)\nS75 = -7950\n===================================================\n3) ????\n\na5 = 5*5 - 4 = 21\na15 = 5*15 - 4 = 71\na25 = 5*25 - 4 = 121\n\nOR MAYBE\n\na1 = 5*1 - 4\na1 = 5 - 4\na1 = 1\na30 = 5*30 - 4\na30 = 150 - 4\na30 = 146\n\nSn = n/2(a1+an)\nS30 = 30/2(1 + 146)\nS30 = 30/2(147)\nS30 = 2205\n================================================\n4)\n\nrth term is nCr-1m^n-(r-1)k^r-1\n\n5th term =\n4C4m^4-(5-1)k^5-1\n4C4 = 1\n\n5th term = k^4
283236
20/10 = 2 because 2 x 10 = 20\nn/0 = n because n x 0 = n? No!!!\nSo n/0=n is wrong.
965295
6 + 4(m+13) -9m\n6 + (4m + 52) - 9m\n58 - 5m