here are the problems i am disabled and on bed rest i do my school over the net and i have no books nor teachers and i have no idea how to do the 2 line ones.
-5x +y=11
-4x +5y=13
-x -y = 7
-3x +5...
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Hey guys i am doing some work on newton raphson and bisection method iterations to find the roots of some fuinctions.
I have attached the graph into a word document. The roots of the function...
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I'm doing an equation for a stats problem and I am confused
is ∑xy the same as ∑x * ∑y ??
does ∑xy mean add up all of x values and add them to all of the y values ...
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Hello all,
I have a query for any Excel heads out there.
I have a list of peoples ages for a healthcare project like this:
1
1
1
1
1
1
1
1
1
2
2
2
3
3
3
4
4
4
5
5
6
7
7
8
9
10
10
10
Does anyone kn...
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They can't be much use if they're only imaginary.
What practical use have they ever been?
.
...
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I'm sure this is very easy, but help would me greatly appreciated.
2 log3x - log3 (x-2) = 2
Could you solve this please and show workings.. would greatly help me thanxs
...
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Say you have a pot with eight balls
4x red
1x blue
1x green
1x black
1x white.
Now if you draw the balls out in pairs, what is the probaility that at least one of the pairs will be t...
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Ok this is going to be pretty hard to say in words but I l have a go.
Basically
I have a set of data points in a xyz co-ord system and I am using interpolation techniques to predict an unknown...
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Hiya,
I've been offered an MSc in Economics in Warwick and I'm probably going to take it up.
However, I have gotten through 4 years of undergrad economics using basic maths and I feel now ...
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Hey again,
Yet another thing I'm a little stuck on - well I think I am anyways.
Question is:
If a,b Elements of Z (Integers) and d = gcd(a,b)
then if C element of Z there exists s,t Elements of Z...
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Hi, i am a final year economics student and i will be moving on to a masters this Sept. I have successfully managed the maths and stats so far in the course, however i feel that my knowledge of th...
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Hi There,
Just working on a few things here for an exam - I need to proof:
For all real numbers a, a^2 >= 0
I have half of proof where:
One must hold: a >= 0 or a <= 0
...
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Hello
I'm looking for someone to give me maths grinds at third level/graduate level.
They should be patient and willing to teach me a specific topic from scratch. I used to be good at mat...
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Hey lads, any chance I could get a hand with this?
i need to get Vb on its own from this equation.
Vb^2/2g - (VbxAb/Aa)^2/2g = h
thanks fellas.
...
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In Junior Cert I remember ini our book there were theorems which had to be learned off and axioms, which could be taken as true.
Now, one of the theorems is along the lines of if two of the an...
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Hello
There are lovely symbols and letters used in Maths. Even though I did a couple of years Maths in college, I don't think I ever really understood what they all mean!
Is there a websi...
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The doubling time of the population of a country is estimated at 100 years, from some fixed point in time. Assuming a constant growth rate, it is estimated that after 1000 years from this time the...
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Hey
Can anyone explain what a dini derivative is? Im so confused with the notation
...
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What are the rules regarding exponents in this example?
2/4 = 6x/7^2
or
2/4 = 6^2/7x
...
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It's a mile back to my house from my nearest supplier of psychedelic wonders. I start walking and as I take my first step the distance doubles, and continues to double with each subsequent step. ...
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Ok, so I have a feeling I should already know this but I'll ask anyway. I have 4 simultaneous equations I wish to solve numerically. I assume I have to use some numerical method but I don't know ...
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I apologise in advance for asking what is probably a really stupid question to you guys, but stats + me = bad. I'm supposed to be doing a graph of the relative amount of something against time... ...
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Hey, i am working with some grouped data and i want to calculate the mean using the midpoint. How can i do this using SPSS?
For example
1-99 Freq : 5
100-199 Freq : 6
200-299 Freq : 4
...
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I have a question which i wonder about from time to time and would appreciate any responses.
1 Why if you multiply 9 by any whole number and add up the reducing digets until they reduce to one dig...
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Anyone know if there is such a thing as a backwards stepwise multiple regression or is a stepwise multiple regression backwards by definition??!Will be running the regression through SPSS but whil...
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