Can someone help me out w/ these Problems... I CAN'T FIGURE THEM OUT!!!!?
831793
1.200/x-200/(x+10)=1\n200(x+10)-200x=x(x+10)\n200x+2000-200x=x^2+10x\nx^2+10x-2000=0\n(x+50)(x-40)=0\nx=-50 or 40\nignoring the negative value x=40\noriginal speed of the car=40mph\n\n2.60/(x+3)+60/(x-3)=9\n\n60(x-3)+60(x+3)=9(x^2-9)\n120x=9x^2-81\n9x^2-120x-81=0\nx=[120+/-rt(14400+2916)]/18\n=120+131.6/18=14 approximately\nspeed of boat in still water =14 mph\n\n3.x^2+24=(x+1)^2-25\n(x+!)^2-x^2=49\n2x+1=49\n2x=48\nx=24\nno of characters=576+24=600
784392
Here is what i found.  I'm not sure how right this is, but you can check it out.  Good Luck with your testing.
919714
If you can't find the answers online then you're not looking very hard.  I typed #6 into the Yahoo search bar and I got a bunch of explanations.  Do your homework, you might learn something.
594141
Go to the links.\nHope it helps.\nLet me know how it goes!
890584
Try these links for possible solutions to your problems. Good luck
713860
1.Xc=1/2pifc\nc=1/2pifXc\n\n2.ib=ibq+rt(2is)\nib(1-q)=rt(2is)\nsquaring\n[ib(1-q)]^2=2is\ns=[ib(1-q)]^2/2i\n\n3.Q=Xl/R\nXl=Q/R\n\n4.Lt=L1+L2+2Lm\n2Lm=Lt-L1-L2\nLm=[Lt-L1-L2]/2\n\n5.Es=E1+E2+E3\nE2=[Es-E1-E3]\n\n6.R1=i2R^2/i2\ni2R^2=i2R1/i2\nR=rt[i2R1/i2]\n\n7.R1/Rx=R2/R3\nRx=R1R3/R2\n\n8.y=mx+b\nb=y-mx\n\n9.i2=i1R1/i1
148434
So, continuing with mr_w's excellent example, we have 4 equations in 4 unknowns. So you can set this up as a matrix-vector problem.  Define matrix M such that M * Number of games bought vector = Cost & total games vector.  Assigning the rows of M in order to the total cost, the PS3 and Xbox360 cost, the PS1 and Xbox360 cost, and the total number of games, \nM = \n70 150 300 450\n0 0 300 450\n70 0 0 450\n1 1 1 1\nNumber of games bought vector =\na\nb\nc\nd\nand Cost & total games vector =\n13910 12000 3050 54\nThe solution will find the values of a, b, c and d.\nWhen I ran the solution I ended up with noninteger values for each and the values checked with the problem statements.  I hope those values were mr_w's solution.
617970
I am terribly afraid of the equilibrium problem.. the first one on the free response!!! well, good luck!
522868
Take it to someone who knows what they are doing. \n\nWe've answered this question about 8 times for you. \n\nBring it to me, and I'll fix it for you - only if you quit posting the same question.
891781
Hi I have tried to help you but keep coming up with nothing. So it look`s like the previous answer is the way to go, good luck I hope you find what your looking for.
91729
check out textbook411.com  they have every textbook printed, and for the best prices. you can get the book and solve your problem!
52637
I had a similar problem not long ago. How I solved it was by following the directions at [1]. Hope this helps!
741999
whats the equation or formula u need help with?
430201
Its tricky work, i need digrams to explain to you so your better just following this link, I think it will help you out.
775488
Ok, Victoria, if you're going to ask for help you have to write the questions correctly.  Problem 1 cannot be solved using algebra the way you wrote it, I doubt you can use complex integration or any other advanced tool to solve that one.  Unfortunately, I just spent the last half hour manipulating it before I remembered that little fact.\n\nPut parentheses in.  Had you put the parentheses in the problem would have been trivial.  Kudos to the helpers who were smarter than I in figuring out the constants were in the exponent.  It's not that hard Victoria, especially when you're asking for help.\n\nWrite the question correctly.\n\n\nPS. Irma, you forgot to multiply the 2 from 4=2^2 through the whole parenthetical statement.  The answer is x=4.\n.
702610
I'll try to help... \n\nFirst, I'm going to leave out all the x-terms, but just imagine they are there:\n\n.................. ........ ......4/5 56/25 -156/125 -1028/625\n5 ... -4 ... 9 ) 4 ... 8 ... -8 ... 4 ... 1 ... -8\n................... 4 .-16/5 36/5\n...................------------------\n................... ......56/5 -76/5 4\n................... ......56/5 -224/25 504/25\n................... ......-------------- -----------\n................... ............. -156/25 -404/25 1\n................... ............. -156/25 624/125 -1404/125\n................... ............. ------------------- ----------------\n................... ............. ........... -1028/125 1529/125 -8\n................... ............. ........... -1028/125 4112/625 -9252/625\n................... ............. ........... ------------- --------------- --------------\n................... ............. ................. .......... 3553/625 4252/625\n\nIf I did it correctly (which there is no guarantee), I get the answer as:\n\n(4/5)x^3 + (56/25)x^2 - (156/125)x - 1028/625)\nwith a remainder of:\n[ (3553/625)x + 4252/625 ] / (5x^2 -4x+9)\n\nHowever, with all those fractions I probably made a mistake somewhere... your math teacher is a masochist!
974490
Well, ma'am, I'd suggest that you install XP.\n\nThis would solve a lot of problems.\n\nHave a nice day.