what is 20X+25-1254....?
964950
20x + 25 - 1254 = 40x - 20x + 2(4+7) -42\n20x - 1229 = 20x + 8 + 14 - 42.\n20x - 1229 = 20x - 20\n20x - 1229 + 20 = 20x\n20x - 1209 = 20x\n20x = 20x + 1209\n20x - 20x = 1209\n0 = 1209?\nWe get an equality which is never possible. \nTherefore, the equation has no real solution
518825
3.95e+20 is a notation which represents 3.95 times 10 to the 20th.  In other words, simply move the decimal place 20 times to the right and you get: 395,000,000,000,000,000,000.
327323
5\n\n400 * .1  = 40 \n 40 * .25 = 10\n 10 * .5 = 5!!
810960
Easy. 40 divided by 2 is 20. Take half of 40.  OR 40x0.5
533330
.0125 = 125/1000 = 1/80\n1/(1 + 1/80)^20 = 1/Sigma_{i=0}^20(20 i)(1/80)^i (Binomial Theorem)\n\nThe answer therefore is 1.0125^(-20) = 1/1.0125^(20) = 1/(1 + 1/80)^20 = 1/(Sigma_{i=0}^20(20 i)(1/80)^i) (where (20 i) is ``20 choose i'' or 20!/((20-i)!i!)\n\nI refer you here:\n\nhttp://answers.yahoo.com/question/?qid=1006042301312&r=w&pa=AptqD2bwHTHf6uePYaI1v.dhpuGB4bYYT_8_LLYltEVS0g-- (Power rules & motivation behing definitions)\n\nand here:\n\nhttp://answers.yahoo.com/question/index;_ylt=AgPxipcpuuk9Hp3qIRmuh2Tsy6IX?qid=1006042631191 (Binomial Theorem)
931130
-4(x+3)>=20    &     x-5< -2\n-4x-12  >= 20    &     x < 5-2\n-4x  >=  20+12   &    x < 3\n-4x >=  32      &    x < 3\nx >= -8   &  x< 3\n-8  <=  x  <  3\n(x lies between -8 and 3)
953140
4000(1 + .06/4)^4*x\n4000(1 +.06/4)^20 = $21227.27\n\n4000(1 + .08/4)^4*x \n4000(1 + .08/4)^20 = $21648.64
649843
Does what you have written means f(x) = 4*x - 5/(16*x^2) - 25 or f(x) = 4*x - (5/16)*x^2 - 25? Make it clear.
747439
(5)(5)-2(5)(-4)+(-4)(-4)\n=25-(-40)+(16)\n=25+40+16\n=81\n\nDon't forget that (-)(-)=(+) and (-)(+)=(-).\n\nGood luck!
957350
x= 5/4 or x= -5/4 if\n\nx=(25^1/2 +x)/5,   5x=25^1/2+x,   4x=+ or - 5,   x=+ or - 5/4\n\nx= 6 1/4 or x= -6 1/4 if\n\nx=25^1/2 + x/5,  4/5x=+ or - 5,  x=+ or - 25/4
129441
It's not possible.\n\nLet a be 20Rs, b be 10Rs, and c be 1Rs\n\na + b + c = 10\n20a + 10b + c = 50\n\nWe can get from these two 10b + 19c =150, or b = 15 - 1.9c\n\nBut no matter what positive integer you put for c, b won't be a positive integer.\n\nSo unless you have half-coins or something, No Solution.
1112053
It means (X + 5)/3 = 25 I guess.
210767
20(1+2+3.....250) = 20 x (1+250) x 250 / 2 = \n\n20 x 251 x 250 /2 = 627,500
820839
x+4+x= -20\nFirst collect like terms.\n2x+4= -20\nGet rid of the 4. Subtract 4 to both sides.\n2x+4-4= -20-4\n2x= -24\nIsolate the x. Divide both sides by 2.\n2x/2= -24/2\nx= -12
1150392
No problem, i just finished a calc3 course in college.\n\nYour problem is the same as 125 * (6x^2 + 5x + 7)^(-1/3)\nYou have to use the chain rule so you get\n125 * (-1/3) * (12x + 5) * (6x^2 +5x + 7)^(-4/3)\n\nthen you can simplify how you like from there
899962
Let x equal the cost of each ball.........\n\n5x </= to 20\n\nNow try your hand at solving it.
739849
20m : 120dB\nx  : 100dB\n-----------------\nx=20m*100dB/120dB\nx=16.66 m