I don't know how to solve it, help please?
204333
5. Here's how you do it:\n\n108x = 180(x-2)\n\n(the "x-2" comes from dividing the pentagon into triangles. All polygons follow the rule a = 180(s-2), where a is the sum of the interior angles, and s is the number of sides in the polygon.)\n\n108x = 180x - 360\n72x = 360\nx = 5
552110
The simplest way is to plug in each of the 4 solutions.\n\n-1.5: -1.5^3 - 3(-1.5)^2 + 8 = -3.375 - 6.75 + 8 = -2.125\n-1.4: -1.4^3 - 3(-1.4)^2 + 8 = -2.744 - 5.88 + 8 = -.624\n1.4: 1.4^3 - 3(1.4)^2 + 8 = 2.744 - 5.88 + 8 = 4.864\n1.5: 1.5^3 - 3(1.5)^2 + 8 = 3.375 - 6.75 + 8 = 4.625
299115
check brilliant tutorials homepage...they have posted the solutions...by the way was there a set A  as well?? anyways good luck!
534929
I have factored it please refer to.\n\nFrom this solution can be found
540687
There are 3 solutions for ABCDEFGHJ -\n\n2 6 7 8 3 5 1 4 9\n2 6 7 9 5 3 1 4 8\n6 7 8 4 1 3 2 5 9
333718
Follow the method from the other 4 problems that you just posted.\nIn order to learn, you have to try things yourself.
490217
I could not understand head and tail of this problem.Please send the proper problem immediately so that it may be solved.
218614
i even tried trial and error, there is no solution to this equation. the result of equation can be maximum equla to 174 (98+76), i tried all the possible values by using trial n error , there is no solution to this. SORRY....!!!!
484440
This solution involves two unknown variables and uses a technique of eliminating one of the variables in order to isolate and solve for the other.\n\nAssumptions:\n\nx = price per day of a hotel room\ny = price per day of a rental car\n\nOur two packages can therefore be expressed as follows:\n\n3x + 2y = 360\n\n4x + 3y = 500\n\nFor our equations to remain true, whatever we do on the left, we must do on the right. We are going to eliminate the y variable by creating an equal term in each equation. To do this we must create equivalent equations that have matching y values. To do this we will multiply the first equation by 3 and the second by 2, creating a value of 6y in each equation:\n\n3(3x + 2y) = 3 * 360\n\nor\n\n9x + 6y = 1080\n\nto adjust equation #2\n\n2(4x + 3y) = 2 * 500\n\nor\n\n8x + 6y = 1000\n\nNow we will subtract the second equation from the first to isolate the x variable:\n\n 9x + 6y = 1080\n-8x + 6y = 1000\n_____________\n 1x + 0y = 80 or\n\nx = 80\n\nOnce we know the value of x, we can solve for y by using the value of x. Now our original first equation becomes:\n\n3x + 27y = 360 or\n\n3 * 80 + 2y = 360 or\n\n240 + 2y = 360, now substracting 240 from each side we get:\n\n2y = 120, dividing each side by 2:\n\ny = 60\n\nWe can check our answer on the second equation by substituting the values of x and y.\n\n4 * 80 + 3 * 60 = 500 or\n\n320 + 180 = 500 or\n\n500 = 500\n\nIt checks.
460998
***************\nQUESTION 1\n***************\nOn the first question, we first have to find the equation that we will be solving for.  \n\nAssume that x is one integer.\nWe know that x+1 is the other integer because they are consecutive.\n\nSo we now put the wording into an equation\n1/3(x + (x+1)) = x - 5\n\nNow we solve the equation\n1/3(2x + 1) = x - 5\n2/3x + 1/3 = x - 5\n16/3 = 1/3x\n16 = x\n17 = x + 1\n\nOur two integers are 16 and 17.\n\nNow we check our answer.\n1/3 of 33 = 11 & 16 - 5 = 11 We are good! :)\n\n\n***************\nQUESTION 2\n***************\nEvery hour, Amy and Randy together walked 3.6 + 4.2 km apart from each other.\n\n3.6 + 4.2 = 7.8\n\nSo, every hour they will be 7.8 more km apart from each other.  We only want 10 minutes though, and there are 60 minutes in an hour. To get how far apart they will be in 10 minutes, we take:\n7.8 * 10/60 = 1.3\n\nRandy and Amy will be 1.3 km apart after 10 minutes.\n\nWe are done! :)
517891
You can't. Any equation like that where the answer isn't reasonably obvious is actually impossible to solve exactly. For example, if you had 2^a + a = 4, its impossible to get an exact answer (using square roots, logs, or whatever you want). Your only hope is to get an approximate answer via graphing or other approximation algorithms.\nOf course, you were lucky in that case :)
340203
Whats the probability that the problem is *not* solved? Tom doesn't solve it (0.75) and Alice doesn't (0.5) so its 0.75*0.5 = 0.375. So the probability it is solved is 1-0.375 = 0.625.\n\nNow, we are given that it is solved. What is the probability that Tom solves it? 0.25. \nSo:\nP(Tom | solved) = P(Tom and solved) / P(solved) = P(Tom) / P(solved) = 0.25/0.625 = 0.4.\n\n(edit - note that the reason the below answer is not quite correct is because it is possible for *both* of them to solve it - so the probability Tom solves it when solved + probability Alice solves it when solved should *not* equal 100% - it should be more.)
416415
Use the following to help solve this problem:\n\ni ^1 = i\ni ^2 = -1\ni ^3 = -i\ni ^4 = 1\n\nThis pattern then repeats:\n\ni ^5 = i^4 * i = 1 * i = i\ni ^6 = i^4 * i^2 = 1 * -1 = -1\n\netc.\n\nSo to solve any i ^n, just look at the remainder of n/4:\n\nremainder \nof n/4 ....... value of i ^n\n- - - -  - - - - - - - - - - - - - - -\n0 ....................... 1\n1 ........................ i\n2 ....................... -1\n3 ........................ -i\n\nSo now let's tackle your specific problem:\n\ni ^16 = 1 (since n=16, n/4 = 4 with remainder of 0)\ni ^6 = -1 (since n=6, n/4 = 1 with remainder of 2)\ni ^5 = i (since n=5, n/5 = 1 with remainder of 1)\ni ^13 = i (since n=13, n/4 = 3 with remainder of 1)\n\nSo, i^16 + i^6 - 2i^5 + i^13 = \n1 + (-1) - 2(i) + i =\n-i\n\nHope that helped!\n\n~ ♥ ~\n\nPS -- The "2-i" answers are incorrect.  Those answerers just made a tiny typo and took 1 - (-1) as the first two terms, rather than 1 + (-1).  Just wanted to let you know, so that you don't put the wrong answer down on your homework.
491157
I'd suggest searching for such problems here on yahoo answers.  You can find out how to do it.
400101
Tackling the problem bit-by-bit:\n\nFirst, let x = the larger number\nlet y = the smaller number\n\nYou can write out an equation to show their relationship of "difference" by:\nx - y = 68\n\nNext, you write out the equation to show their quotient relationship by:\nx/y = 5\nwhich gives:\nx = 5y\n\nNow plug x = 5y into the "difference" equation:\n(5y) - y = 68\nwhich gives\n4y = 68\nwhich gives \ny = 17\n\nNow plug y = 17 into the "difference" equation:\nx - 17 = 68\nx = 85
446355
r = 0 is one solution.\nThe other one is impossible to find exactly; the best you can do is a numerical approximation, which gives r = 0.0809394, approx.
437273
I already answered this in the other thread. Theres no solution: |2x-1| >= 0, so the left hand side is >= 0 + 3 = 3.\nNote that I'm not telling you that you did something wrong - 'no solution' is a perfectly legal answer to 'solve for x'.