did sigma & square root mix or work together?
108492
Assuming you are talking about standard deviation...\n\nSigma is the square root of variance.  If you need to add sigma's together, they are added by taking the square room of the sum of squares.
714992
I'm 100% sure you will fail your tests if you dont at least try these yourself.  You should try them, get an answer, and then if YOU'RE not sure, ask the question here with your solutions and maybe someone will show you right or wrong.\nAs it stands now it sounds like you're just lazy and want someone else to do your homework.\nBesides, I see many many WRONG answers in this mathematics category.  Its like you'd just be copying your final exam answers from the class idiot.\n\nBY THE WAY...\nThere are two square roots of EVERY number.  So every answer which gives just one solution (unless the question specifically asks for just the negative square root, as in "the negative square root of of 169/4") is incomplete.  You dont have to specify "what is the negative and positive square root of (a number)...".  Asking for the square root of a number demands two solutions.
986507
just square the root and uve cancelled it
769354
Not at all. Scalar or vector addition is not affected by order.
163366
Yes with a gaussmeter.
583216
you can't add the two. If the numbers under the radical are different they can't be added. You can use a calculator and find the decimal answers and add those, or just leave it as an addition problem.\n\nTo prove it, the square root of two is about  1.414, the square root of six is about 2.449. the sum is 3.863, however the square root of 8 is 2.828, so they aren't equal.\n\nIt's not possible to have the exact form because they can't be added. It's simplified as the equation root two + root 6
539132
both roots are complex numbers
120843
R^2 (root mean square) is just a statistical measure of how well your data lines up. Anything over .99 is near perfect.
118066
This is the coolest math question.\n\nI wondered for YEARS why I would want to use the square root key in everyday life.\n\nSo here are some practical reasons:\n\n1. Carpenters need square root to figure out how long to make the rafters on a roof. You can kind of see how a slanted roof is like a triangle and a simple formula using square root gives you the long side when you know the two shorter sides.\n\n2. If you are using a copying machine to reduce a picture for a project. Let's say you want to reduce a picture to half size, that is 50 percent. Most copiers can only reduce to 69 percent. So if you take the square root of 50 percent you get 71 percent. Set the copier to 71 percent, copy the picture once, and then copy the COPY, thats 0.71 times 0.71 equals 0.5 or 50 percent!\n\n3. Square root can be used to visualize large numbers. Let's say your school has 2,700 students. The square root of this is about 52. so if you had the students line up on in square pattern on the football field, there would be 52 along a side. Makes it easier to understand.\n\n4. It is awesome for calculating proportional averages.\nFor example, say one kid can eat 22 hot dogs in a hot dog eating contest. The champion can eat 33 hot dogs.\nThe regular average is 28 hot dogs. But this number isn't really useful. Now if you multiply 33 by 22 and take the square root, you get 27 hot dogs. The cool thing about 28 is  that 33 is to 27 as 27 is to 22 -- so it is good for making proportional comparisons.\n\n5. It is great for comparing and understanding areas. If you read that Montana is 147,029 square miles, just take the square root and you can easily imagine a square which is 383 miles on a side.\n\n6. It is so totally important for video game design where it used for everything from computing positions to creating graphic filters to make realistic patterns.\n\n7. Even basic statistics use it to help understand for example the health needs in a community.\n\n8. GPS and mapping use square roots all the time to figure out where you are!\n\nThat's how it can be used in everyday life in totally easy to get ways.
813100
ΔH =ΣΔHf°prod-ΣΔHf°react
999326
If you start with a number bigger than one, then the square root will always be smaller than the number, but bigger than 1.  So every time you take the square root, the number gets smaller, but never gets smaller than one.  Eventually it's so close to one that the calculator just displays it as 1.
624769
You can use sin and cosine.
1115017
thursday....mayonnaise...and the square root of two
40612
Sigma\none sigma is one standard deviation from the mean, etc.
349279
Squareroots can be added as long as whatever is under the sqrt sign is the same.  YOu add the coefficients(the numbers in front of the sqrt symbol).\nExample:  sqrt(3) + 9*sqrt(3) \nThese can be combined because both terms contain a 3 under the sqrt sign.\nAdd the coefficients\nsqrt(3) + 9*sqrt(3) = (1+9)sqrt(3) = 10*sqrt(3)\n\nAnother example:\nsqrt(2) + sqrt (3)\nThese cannot be combined because there are different numbers underneath the sqrt sign (a 2 and a 3).\nSince these cannot be combined, the answer is just\nsqrt(2) + sqrt (3)\n\nA few people have said that:\nsqrt(2) + sqrt(2) = sqrt(4)  This is NOT true!!\nTo simplify, you add the numbers in front of the sqrt sign\nsqrt(2) + sqrt(2) = (1+1)*sqrt(2) = 2*sqrt(2)\nsqrt(4) does NOT equal 2*sqrt(2)\nNote: If there is no number in front of the sqrt sign, then it is automatically 1).
58030
You sure it was not a "sigma"?\nIf so, it is a capital sigma, which looks like a pointy capital letter E.\nIn math, it means to sum (add) all components is has along with it.\n\nCheck out the link below.  It shows the sigma used twice in a word.
981364
Gopal has the correct answer! \n\nSo... becareful with some other results... and... never use:\n0.833 instead of 5/6... it's a mistake!\n\nFinished Algebra with 19!