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Today,
11:08 PM
pka
replied to a thread
Growth Problem: initial value 10, 50 periods, +10 1st period, +20 2nd period, etc
in
Beginning Algebra
My first reply was done in a bit of a hurry (I give a class on Wed) Back now. As I said before as posted this is clearly a recursive relation. I...
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3 replies | 29 view(s)
Today,
10:51 PM
Feynmanfan
replied to a thread
How are different bases pronounced?
in
Arithmetic
Hi there, obviously not a serious question, and in any case I have already answered it. Here's one for you: is that number even or odd? And how do...
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9 replies | 58 view(s)
Today,
10:04 PM
Dr.Peterson
replied to a thread
scaling standard deviation
in
Probability / Statistics
Let's guess that you just want a formula to produce the values you show here. You have a linear relationship y = f(x), where f(0.5) = 0.00011, and an...
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8 replies | 85 view(s)
Today,
09:49 PM
Dr.Peterson
replied to a thread
basic quadratics help
in
Beginning Algebra
Perfect square trinomials are a very special case, (a+b)^2 = a^2 + 2ab + b^2. If the first and last terms of a trinomial are squares, it may have...
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3 replies | 18 view(s)
Today,
09:46 PM
harrison
replied to a thread
scaling standard deviation
in
Probability / Statistics
I just meant "scaling standard deviation" in the sense of what I was trying to accomplish. It really means nothing. Knowledge of the hurst...
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8 replies | 85 view(s)
Today,
09:33 PM
JeffM
replied to a thread
basic quadratics help
in
Beginning Algebra
The way you are being taught is idiotic. Many quadratics with real coefficients cannot be factored over the real numbers, and the majority of those...
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3 replies | 18 view(s)
Today,
09:12 PM
JeffM
replied to a thread
What statistical analysis needs to be used?
in
Probability / Statistics
Regression.
see more
1 replies | 19 view(s)
Today,
08:39 PM
tkhunny
replied to a thread
basic quadratics help
in
Beginning Algebra
The factored form must look like this (am+bn)(cm+dn) a*c = 6, a = 6 and c = 1 or a = 3 and c = 2 or a = 1 and c = 6 or a = 2 and c = 3. There are...
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3 replies | 18 view(s)
Today,
08:34 PM
Drazil
started a thread
basic quadratics help
in
Beginning Algebra
here is the equation; 6m^2+11mn+3n^2 usually, a and b are perfect squares, allowing me to easily factor now that 6 and 3 aren't perfect squares,...
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3 replies | 18 view(s)
Today,
07:58 PM
Denis
replied to a thread
Net present value (NPV), annual equivalent (AE): investor has 2 alternative projects
in
Finance/Business Math
Yes...if the 1st $1000 is deposited at same time as the $5000... Would be 11,499.59 if 1 year later...agree? I was asking if you had the answer...
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4 replies | 122 view(s)
Today,
07:12 PM
Dr.Peterson
replied to a thread
Working out area: How many people can sleep in the tent?
in
Geometry and Trig
Presumably, you are talking about the same tent as the picture you showed in the other question. One way to do it is to draw in a sleeping bag or...
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2 replies | 32 view(s)
Today,
07:02 PM
Dr.Peterson
replied to a thread
Growth Problem: initial value 10, 50 periods, +10 1st period, +20 2nd period, etc
in
Beginning Algebra
What is your context, so we can know what kinds of answers are suitable? What have you learned about series? Also, I'm not quite sure whether...
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3 replies | 29 view(s)
Today,
06:58 PM
Raja
started a thread
What statistical analysis needs to be used?
in
Probability / Statistics
Temperature affects Dengue. If you have average monthly temperature and the number of dengue cases per month (as shown) what statistical analysis/...
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1 replies | 19 view(s)
Today,
06:40 PM
stapel
replied to a thread
Replying to a thread started by others
in
Administration Issues
This happens from time to time, even to moderators. Nobody seems to know what the issue is, though editing one's response can somehow trick the...
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1 replies | 41 view(s)
Today,
06:38 PM
stapel
replied to a thread
Discovery Math Square Solution Needed
in
Arithmetic
Maybe, but that's not what we do here. We help the student figure out how to do this on his own. So please reply with a clear listing of your...
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1 replies | 14 view(s)
Today,
06:26 PM
stapel
replied to a thread
Working out scale (find size of tent, given scale & drawing)
in
Pre-Algebra
How many one-centimeter squares do you count, going from the left side to the right side of the drawing? Since each square's width stands for 0.25...
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1 replies | 22 view(s)
Today,
06:22 PM
stapel
replied to a thread
Working out area: How many people can sleep in the tent?
in
Geometry and Trig
Until they tell you the dimensions of the tent, there is no way to answer this question. Sorry. ;)
see more
2 replies | 32 view(s)
Today,
06:19 PM
stapel
replied to a thread
Urgent help a short question: Does (-a^3)^2 equal -a^6 or +a^6 ?
in
Beginning Algebra
If you're not sure, try plugging some numbers in. For instance, if a = 1, then a^3 = 1^3 = 1, -a^3 = -1, and (-a^3)^2 = (-1)^2 = ...? ;)
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1 replies | 11 view(s)
Today,
06:16 PM
pka
replied to a thread
Growth Problem: initial value 10, 50 periods, +10 1st period, +20 2nd period, etc
in
Beginning Algebra
This is a recessive function: g(1)=20,~g(n+1)=10\cdot (n+1)+g(n) SEE HERE
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3 replies | 29 view(s)
Today,
05:58 PM
Dr.Peterson
replied to a thread
How are different bases pronounced?
in
Arithmetic
Your question was not about introducing the topic to children, but about what is correct, or how they are "usually" read. Moreover, "two fives and...
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9 replies | 58 view(s)
Today,
05:53 PM
pka
replied to a thread
How are different bases pronounced?
in
Arithmetic
How would say 20011_3 to that same child?
see more
9 replies | 58 view(s)
Today,
05:49 PM
stapel
replied to a thread
Data Storage
in
Advanced Math
What are "T", "L", and "X"? What formulas are you supposed to be using? Within what context (math class, math topic, level of study) did this...
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3 replies | 91 view(s)
Today,
05:46 PM
Dr.Peterson
replied to a thread
scaling standard deviation
in
Probability / Statistics
Yes, and I still have no idea what "scaling standard deviation" means. I'm just waiting to see if someone else has an idea.
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8 replies | 85 view(s)
Today,
05:39 PM
Feynmanfan
replied to a thread
How are different bases pronounced?
in
Arithmetic
Thanks for the replies. The "official" rule is that other than base ten, you just read out the digits: "two one base five". If I say "twenty-one...
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9 replies | 58 view(s)
Today,
05:15 PM
JeffM
replied to a thread
Throwing three different dices - probability of getting a six
in
Probability / Statistics
I meant to say, but somehow forgot, that my method was not that different from PKA's. I was more interested in tying it to basic definitions and...
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8 replies | 101 view(s)
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