how do you answer this math problem y+9=2x+12?
916997
y+9=2x+12\n\nSolve for y:\n\n y+9=2x+12\n    -9=    - 9\n----------------\ny=2x+3\n\nsolve for x:\n\ny+9=2x+12\n -12=    -12\n--------------\ny-3=2x\n       ````\n        2\n\nx=y-3\n    ````\n      2\n\nx=y-3/2    y=2x+3
122527
1 - 64x^2 = (1 + 8x)(1 - 8x)\n\ny^2 - 12y + 36 = (y - 6)(y - 6)  or (y - 6)^2
844586
9x^2+y^2=9......(eqn no 1)\n3x-y=3 .............(eqn. no. 2)\nFrom equn. no. 2,we get y=3x-3=3(x-1)\nPutting the value of y in eqn.no.1,w get\n9x^2+{3(x-1)}^2=9\n=> 9x^2+9(x^2-2x+1)=9\n=>9x^2+9x^2-18x+9=9\n=>18x^2-18x=0\n=>18x(x-1)=0\nTherefore either 18x=0 or x-1=0\ntherefore x=0 or 1\nPutting the value of x in eqn no 2,we get 3X0-y=3 or y=-3  or 3X1-y=3,in which case y=0 \nTherefore x=0,y=-3 or x=1 and y=0
409430
12x - 16y = 8\n9x - 12y = 6\n\n12x - 16y = 8\n-16y = -12x + 8\ny = (3/4)x - (1/2)\n\n9x - 12y = 6\n-12y = -9x + 6\ny = (3/4)x - (1/2)\n\nANS : 3.) (t,(3/4)t - (1/2))\n\nThats if i understand you correctly.
564677
x=2 y=1 so 1 = a*2^b\nx=6 y=9 so 9 = a*6^b = a*(2^b)*(3^b)\n\nbut a*(2^b)=1 from the first eq so\n\n9 = 3^b, this givez b=2\nfrom here, a=1/4\n\nthe function: y=(x^2)/4
214223
I can explain this with simple mathematics..\nLet the number u choose be 'x'.\nNow double the'x' and adding 12 gives us:\n2x + 12.\nDividing this expression by 2 gives us:\nx + 6.\nSubect the no. u thought i.e. 'x' from this and what u get is 6.\nAm I correct Ma'am?
704540
Add the two equations together: (2x+y)+(x-y) = 1+8, so 3x = 9, x = 3.  Then 2*3+y = 1 so y = -5.\n\nSteve
454049
dozen... 99+9 = 108... 9 dozen = 9 * 12 = 108
770834
y=x+3\ny=2x-4\nfirst u need to replace the x+3 in place of y in the 2n equation to get this\nx+3=2x-4\nthen subract the x from both sides to get this\n3=x-4\nthen add 4 from both sides to get this\n7=x\nthen replace the 7 in one of the equations to get y to get this\ny=7+3\nthen you are going to get the anser like this\ny=10\nthe answer is (7,10)
269336
To solve this problem, you have to substitue the coordinates into point-slope form using the slope (-5) as m.  The y1 refers to the y coordinate, while the x1 refers to the x coordinate.\n \ny-y1=m(x-x1)\ny+12=-5(x+12)\ny+12=-5x-60\ny=-5x-72\n\nslope=-5\ny-int.=-72\n\nThe person above me has everything right except when she had -12=-5(-12)+b.\n-12=-5(-12)+b\n-12=60+b\n-72=b\nb=y-int=-72
166491
Start with adding 7 + (9 + 12).  The sum is 28.  The equation now looks like this:\n\n(c + 9) + 12 = 28\n\nNext, subtract 12 from both sides of the equation:\n\n(c + 9) + 12 - 12 = 28 - 12\n\nThe equation now looks like this:\n\nc + 9 = 16\n\nSolve it from there.
421517
y-y^1=m(x-x^2)\ny-8=2(x-(-2)\ny-8=2(x+2)\n A is the correct answer.\ny-8=2x+4\ny=2x+4+8\ny=2x+12 >> y form\n(transpose)\n-2x+y=12\n(if the variable x is negative make it positive)\n-(-2x+y=12) \n2x-y=-12 >> standard form
726659
y = 60 - 12 + 8\n\ny = 48 + 8\n\ny = 56\n\nThe answer is y = 56\n\n - - - - - - - - - - - - - - -\n\nY = 60 - 12 + 8\n\ny = 60 - 4\n\ny = 56\n\nThe answer is y = 56\n\n- - - - - - - - - - - - - - - -\n\nI agree with dolf\n\nIt does not matter how you perform the addition and subtraction The results are the same.\n\n- - - - - - -s-
21241
=2x(x+6)+2(x+6)\n=2x^2+12x+2x+12\n=2x^2+14x+12\n\nRefer the below site for the concepts. Its quite nice.
777066
(x+4)(2x+4)-2x^2=88\n2x^2+12x+16-2x^2=88\n12x+16=88\nadding -16\n12x=72\ndividing by 12\nx=6\nso the dimensions of the original rectangle are  6m*12m
450302
3y+2x=12\n2x=-3y+12\nx= -3/2y+6\nx=-3/2(x-1)+6\n =-3/2x-(-3/2)+6\n = -3/2x+15/2\n5/2x=15/2\nx= 3\n\ny= -3/2y+6-1\n5/2y= 5\ny= 2
583862
several answers, but here is an easy one:\n\nassume: (-1,1) is the vertex.\n\nThen y=(x+1)^2+1\n\nbut what makes f(1) = 9?\n\n9 = a(1+1)^2+1 \n8 = a(2)^2\n2 = a\n\nso y = 2*(x+1)^2 + 1\n\nPlug both points in and you will see that this equation works.\n\n\nOOPS, sorry, I misread the problem.  The guy below me is correct.