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Factoring cubics and quartics |
2010-09-29 |
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Tori pose la question : How do you factor these types of questions:
* x^3 - 4x^2 - x + 4
*2x^3 - 3x^2 - 4x - 6
*x^4 - 15x^2 - 16 Robert Dawson lui répond. |
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limit as x approaches a of ((x^(1/2))-(a^(1/2)))/(x-a)? |
2010-09-29 |
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emily pose la question : limit as x approaches a of ((x^(1/2))-(a^(1/2)))/(x-a)? Penny Nom lui répond. |
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A limit |
2010-09-27 |
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norma pose la question : I have a problem like this one but I can get it right. please help me to answer
find the constant a such that the function is continuous on the entire line.
g(x)= {x^2 - a^2 / x-a if x is not = a
{6 if x = a Penny Nom lui répond. |
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An investment of 500$ |
2010-09-27 |
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georgia pose la question : if you invest 500$ at a 7% annum and the balance at a 10% annum and your interest earned is 44$ annum how much was invested in the 7% and how much in the 10%. Penny Nom lui répond. |
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An equation involving logarithms |
2010-09-27 |
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mindy pose la question : Hi,
I am trying to find x, the equation is:
log_2(log x + 2 (log x)^(1/2) + 1) - 2 log_4((log x)^(1/2) + 1) = 1
Thank you very much for your time. =) Harley Weston lui répond. |
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4√3 + 2√1/3 |
2010-09-25 |
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Michelle pose la question : How do you solve 4√3 + 2√1/3? Please show step by step. Penny Nom lui répond. |
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The distance between the origin and a moving point |
2010-09-24 |
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Norma pose la question : I am having problems with this question
find the rate of change of the distance between the origin and a moving point on the graph of the function below if dx/dt=5 cm/sec
y=x^2+2 Penny Nom lui répond. |
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rat sequence |
2010-09-24 |
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Vishal pose la question : this is known as rat sequence. I want to know the logic pf this :-
1,2,4,8,16,77,145 Chris Fisher lui répond. |
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20% profit on the selling price |
2010-09-24 |
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ata pose la question : My cost is 100 and I want to make 20% profit on my selling price (not 20% of the cost). So, what should be calculation formula? Let's say my cost is 493.71 and I want to make 53.28% profit on the selling price; so how to determine the selling price? Penny Nom lui répond. |
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The third vertex of a triangle |
2010-09-23 |
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nikos pose la question : Hi, I would really appreciate any help in this:
"Suppose you have a triangle (any triangle, no hypotheses allowed), let's call it ABC.
You know the coordinates of the two vertexes, A(x1,y1), B(x2,y2) and the area of the triagnle, let's call it D.
Can you find the third vertex of this triangle based on these facts?"
Thanks a lot! Harley Weston lui répond. |
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A reverse PST calculation |
2010-09-23 |
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Manning pose la question : Hi, I'm a manufacturing contractor in Saskatoon. The way to calculate PST for us is using total contract amount x 70% then 5%.
For example, contract amount of $100 x 70% x 5% = $3.5 (PST). The subtotal is using contract amount + PST.
$100 + $3.50 = $103.50.
If you only know the subtotal is $103.50 including PST, how do you reverse calculation to get the contract amount?
Thank you very much for your help. Harley Weston lui répond. |
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A three digit number |
2010-09-22 |
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Andrew pose la question : Both the sum and the product of its three digits are 6. The least digit is in the hundreds place and the greatest digit is in the ones place. Write it in word form: Penny Nom lui répond. |
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A taxi ride |
2010-09-22 |
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Jack pose la question : A taxi ride costs you $2 for the first km and 10 cents for each tenth of a km thereafter.
Sketch a graph of the total cost $C(x) for a ride of xkm, for 0 < x < 2. Hint: The
graph is not smooth.
How will I start this question off? I tried the table of values method, and then graphed it, but it comes out as smooth, Stephen La Rocque lui répond. |
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Finding a Number Pattern |
2010-09-22 |
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Cheryl pose la question : Sunshine Math - 4, Jupiter 1, question 4 which is (a, b, c & d). I am wanting to know question 4d. Think about the following list of number pairs. Three is the first number of a pair, and 8 is the second.
3 - 8
4 - 11
5 - 14
6 - 17 and so forth
Question d. - If a number "n" is the first number, what is the second number?
I don't know how my son should answer this question. It sounds like it should be a formula but how does he get to it and how do I explain it to him.
Looking forward to your help.
Cheryl Janice Cotcher lui répond. |
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Percentage of Revenue Generated |
2010-09-22 |
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Jeri pose la question : Hi! I am trying to fill out the government form for obtaining a business license and this is all new to me...it wants to know the estimated percentage of revenue that my product generates. An easy formula to figure this out would be greatly appreciated! Stephen La Rocque lui répond. |
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