the equation is y=3x-9, whenever x increases by 1, how much does y increase or decrease?
341837
y=-9\ny=-6\ny=-3\nincrease by 3\nand the slope is 3
701694
7x + y = 1 (subtract 7x from both sides)\ny = 1 - 7x\n\n3x + 2y = -9 (substitute in for y)\n3x + 2(1 - 7x) = -9\n3x + 2 - 14x = -9 (subtract 2 from both sides)\n-11x = -11\nx = 1\n\ny = 1 - 7x (substitute in for x)\ny = 1 - 7(1)\ny = 1 - 7\ny = -6\n\nAnswer: (1, -6)
214475
Using: y=mx+c\n\n3=-1m+c  ....Eqn(1), for point (-1,3)\n\n9=3m+c   ....Eqn(2), for point (3,9)\n\nHence, m=c-3  from Eqn(1).\n\nSubstituting m=c-3 into Eqn(2) gives us\n\n9=3(c-3)+c\n\nImplies   9=3c-9+c\n\ntherefore   18=4c\n\nand so c=9/2  (you know 9 divided by 2)\n\nputting c=9/2 back into m=c-3\n\ngives m=9/2-3 (9 divided by 2 takeaway 3)\n\nthis gives m=9/2-6/2 \nthis gives m=(9-6)/2 \nand so     m=3/2\n\nHence Eqn of line: y=(3x/2)+(9/2)\n\nFinally                  2y=3x+9\n\nis the Equation of the line. The Answer.\n\nTo check put (-1,3) or (3,9) in this final equation to see if both sides are equal.  Hope this works.  \n2 times 9 = 3 times 3 + 9. \n18=18 So yes the answer is right.\n\nHope this helped!
270089
Well, -3 x -3 is 9, since two negatives make a positive.\n\n9 x -3 is -27.\n\nThe answer would be -27, since you need to multiply -3 by itself three times.
676592
3^x = y\n9(3^x) = 9(y)\n(3^2)(3^x) = 9y\n3^(2+x) = 9y\nAnswer: c) 3^(2+x)
52909
x= -1\ny= 3\n\nSimply substitute the x and y values in the equation.\nTherefore\n=(-1)+3*3\n=(-1)+9\n= 8
817379
y=(x^2-3x)^2\ny=x^4-9x^2\nAnd then I'm confused.
864245
3x/(x - 9) - 27/(x - 9)\n= 3x-27/(x - 9)\n= 3(x - 9)/(x - 9)\n= 3
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
221619
x-4x+9+3(-2+1)+2=0\nx-4x+9+3*(-1)+2=0\nx-4x+9-3+2=0\n-3x+8=0\n-3x=-8\nx=8/3\nThis is if the equation was x-4x+9=-3(-2+1)-2, but if it was just -4x+9 = -3(-2+1)-2 than the answer is 2 (-4x=-8    x=2).
1034047
If y=6x  \n\nAnd x = 1.5\n\nThen multiply 6 times 1.5\n\nThe answer is 9.
783589
X & Y\n\n4XY=X+Y\n\nSolve for X or Y and then substitute your result in the above equation. \n\nX=4XY-Y\n1=3Y\nY=1/3\n\n4x/3=1/3+x\n4x=1+3x\nx=1\nProof:\n4(1/3)=1+1/3\n4/3=4/3
895342
x^2-9x-x+9=0\n(x-9)(x-1)=0\nx=9 or x=1
82888
1) Y=0\n\n2) X=0\n\n3) X=17 & Y=1
959472
2(3x+1)=9x-1\n\nFirst you multiply 2 times (3x+1) \n\n6x+2 = 9x -1\n\nthen you subtract 6x from each side \n\n2 = 3x - 1\n\nthen you add 1 to both sides\n\n3 = 3x \n\nDivide both sides by 3 \n\nx = 1
104006
Start with \n\n    4x + 9y = 24\n\nsubstitute the value of y from the second equation:\n\n    4x + 9(-x/3 + 2) = 24\n--> 4x -3x + 18 = 24\n--> x = 24 - 18\n--> x = 6\n\nand now y can be computed,\n\n    y = -6/3 + 2\n--> y = 0
797189
x - 3y = 9\n\nTo solve for "y" you have to isolate it on one side of the equation. First subtract x from both sides to get: \n\n-3y = 9 - x\n\nthen divide both sides by -3 to get:\n\ny = (9 - x) / -3  \n\nWhich is y = -3 + 1/3 x or in slope-intercept form: \n\ny = 1/3 x -3 \n\n\nNow graph the y-intercept at -3 and use the slope (go 1 up + 3 across) to get the next point and so forth. \n\nHope this helps...Good luck! =)