Math Question, Can anybody help me? I don't get how to do this.?
402712
OK - here goes:  \n\nLet X equal the number of pounds of the six buck coffee.\n\nThen, 6*X + 4*3 = 4.75*(X+3)\n\nSo, 6x + 12 = 4.75x + 14.25\n\nSubtract 4.75x from each side to get:\n\n1.25x + 12 = 14.25.\n\nSubtract 12 from each side to get:\n\n1.25x = 2.25.\n\nDivide each side by 1.25 to get:\n\nX = 1.8.\n\nTo check it:  1.8 pounds of 6 dollar coffee would cost $10.80.  3 pounds of 4 dollar coffee would cost $12.00.  Together, you have 4.8 pounds of coffee that cost $22.80, and $22.80/4.80 pounds = $4.75 per pound.\n\nSo, 1.8 pounds is the answer!
1053054
Use the binomial.  I've already shown you how in a previous question.  And you already know that you need to use it.
705864
Alright, don't listen to the above post...\n\nGrade 12 here, answering questions all day for mere fun.\n\n12)\ny - 3 = -1/3 (x + 4)\n\nEXPLAINED\n\nadd 3 to both sides\ny = -1/3 (x + 4) + 3\n\nexpand 1/3(x + 4) \n= x * 1/3 + 4 * -1/3\n= x/3 + 4/3\ny = -1/3x - 4/3 + 3\n\nTo add -4/3 and 3, use 3 = 9/3\ny = -1/3x - 4/3 + 9/3\ny = -1/3x + 5/3\n\nTrue, my bad. I originally added 4/3 instread of -4/3\n\n\n16)\n(-2, -1) (4, -4)\n\nm = Dy / Dx\nm = ((-1) - (-4)) / ((-2) - (4))\nm = 3 / -6\nm = -1/2\n\ny = mx + b\n(-1) = -1/2(-2) + b\n-1 = 1 + b\n-1 - 1 = b\n-2 = b\n\ny = -1/2x - 2\n\nCHECK\ny = -1/2(4) - 2\ny = -2 - 2\ny = -4\nTherefore it works.\n\n18)\n(0, 0) (2, 3)\n\nm = Dy / Dx\nm = ((3) - (0)) / ((2) - (0))\nm = 3/2\n\nb = 0\n\ny = mx + b\ny = (3/2)x + 0\ny = (3/2)x\n\nNote, the lower post copied my answers
842934
Ok, first you must get the -8 and the x/-2 out of parentheses, so u just multiply them both by one. So then is -8 * x / -2. First, you do -8 * x, which is -8x. The problem then becomes -8x / 2. In this step, just don't mind the negative or the x and just put them back in at the end. So you're really just doing 8 / 2, which is 4. You must put the - and the x back in, so the answer is -4x. Ta Da!
353406
You will want to isolate the variable (many times it is 'x'). First you will add or subtract from each side. Then divide. For example:\n5x+4=19, subtract 4 from each side giving 5x=15. Then divide by 5 giving x=3. I hope this helps.
858552
Have you tried these?  Surely you've been told that division by 0 isn't possible, so there's your answer for 7.  I'm not doing any others on Yahoo answers (too many at once), but if you really need help and are willing to do as much as possible for yourself I'll help you if you email h_chalker@yahoo.com.au, but nasty Maths teachers like me won't just hand you 7 answers on a plate!
886428
____________________________________________________\n| \nBecause the bottom number is the same- X, so u add the top number-1+2, and u get 3. let me show you-- 1/x+2/x=3/x\nArent i right???!!!!!!!!!!
703752
simply subtract 7 from both sides. This leave you with\n\nx<_3
883460
Please see the answer above and find out the missing factor in your calculation. You are in the right track. All the best!
909143
take out the x\nx(a-b)=6\nx=6/(a-b)
912865
bring the a's to one side... u then get 9a = 27 ... divide and answer is a = 3
781088
Plug in 2 for x to determine this:\n\n3(2) + 5 = 6+5 = 11 ≠ 17\n\nTherefore 2 is not a solution.\n\n~ ♥ ~
821450
go to a math website off yahoo. it should help.
137368
2x+3 = 5\nsubtract 3 from both sides\n2x+3-3 = 5-3\n2x = 2\nDivide both sides by 2\nx=2/2\nx=1
559152
are u sure its not supposed to be the other way around. Cuz that would make a little more sense.\n\nBut if not, then it would probably be:\n1 + ((4s squared - 11) / (s to the 4 - 3s squared -11))\n1 the quotient. the rest the remainder.
779736
Multiply by (n-2)\nn - 2(n-2)/3 = 2\nMultiply by 3\n3n - 2n + 4 = 6\nn = 2
893993
1.  Here you just divide both sides by 5 to get the x by itself\nand you get :\n5x<35\nx<7\n\n2. Divide both sides by 4\n4y>15\ny>15/4\n\n3.  Divide both sides by 16\n16y<64\ny<4\n\n4.  Divide both sides by a -18. Remember that you have to switch the equality sigh when you divide by a negative:\n-18y>-36\ny<2\n\n5. First, combine like terms (x):\n5x + 6x <-33\n11x<-33\nDivide both sides by 11:\nx<-3\n\n6. Combine like terms (y):\n-12>2y - 6y\n-12>-4y\nDivide by a -4. Remember to switch the equality sigh \n3<y\n\nHope that was helpful!