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tkhunny
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tkhunny
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04-12-2005
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Yesterday
11:23 PM
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Yesterday,
08:26 PM
tkhunny
replied to a thread
Yr 5 maths - is there a mistake in the question?
in
Arithmetic
Maybe someone tore some pages out of a nonfiction book. I have to agree with your assessment. Incorrect question.
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3 replies | 84 view(s)
Yesterday,
08:19 PM
tkhunny
replied to a thread
I need help with the quadratic formula
in
Intermediate/Advanced Algebra
There is no definition of \pm. There is only usage that we all play like we understand. They can't be exactly the same unless it is squishy. ...
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3 replies | 84 view(s)
Yesterday,
04:42 PM
tkhunny
replied to a thread
serious problem help needed: there are 400 llamas and alpacas in total....
in
Arithmetic
How many llamas were there initially? Call it something. L? How many alpacas were there initially? Call it something. A? That was about half of...
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4 replies | 107 view(s)
Yesterday,
04:40 PM
tkhunny
replied to a thread
Solve three algebra tasks (involving composite functions and inverse functions)
in
Beginning Algebra
Why not use that composite idea to prove whether things are inverses? Find (f(g(x)) and g(f(x)).
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2 replies | 61 view(s)
Yesterday,
04:36 PM
tkhunny
replied to a thread
My Calculus group work for University - Help Please!
in
Calculus
One at a time, please, and show your work. The first is an existence problem. Who cares exactly WHAT the solution is? We just need to now that...
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1 replies | 52 view(s)
Yesterday,
04:33 PM
tkhunny
replied to a thread
Yr 5 maths - is there a mistake in the question?
in
Arithmetic
It is a difficult thing to translate through a third party. Whole Library: N = # of NonFiction Books F = # of Fiction Books We know that F...
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3 replies | 84 view(s)
Yesterday,
04:28 PM
tkhunny
replied to a thread
Introduction and a math question
in
Calculus
Not much to go on. Perhaps the actual problem statement AND your best work?
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4 replies | 83 view(s)
Yesterday,
04:25 PM
tkhunny
replied to a thread
I need help with the quadratic formula
in
Intermediate/Advanced Algebra
The method of "b^2"? Isn't this usually called "Completing the Square"? Anyway, \dfrac{-b\pm\sqrt{b^{2} - 4ac}}{2a}\;and\;\dfrac{b\pm\sqrt{b^{2}...
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3 replies | 84 view(s)
Yesterday,
04:19 PM
tkhunny
replied to a thread
Gambling Phrase: "$5.00 will get you $10.00 if she is late again for work."
in
Arithmetic
It is a common fallacy in the personal calculation of "winning" at gambling. It sounds like your winnings are more if you forget that you wagered...
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5 replies | 173 view(s)
11-18-2017,
08:05 PM
tkhunny
replied to a thread
Question about Lagrange multipliers for maximizing a function with two constraints
in
Calculus
Really, though, you fix the problem by writing L2 instead of the incorrect L1 in the second equation. :-)
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13 replies | 414 view(s)
11-17-2017,
09:29 PM
tkhunny
replied to a thread
integrating dy = x^3 dx - 3x^2 dx + x dx to get y = (x^4)/4 - x^3 + (x^2)/2 + c
in
Differential Equations
It's just a linearity property. Just draw an integral sign in front of EACH term.
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1 replies | 109 view(s)
11-17-2017,
12:48 PM
tkhunny
replied to a thread
Gambling Phrase: "$5.00 will get you $10.00 if she is late again for work."
in
Arithmetic
We both put $5 on the table. If she's late, you take it all. If she's not, I take it all.
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5 replies | 173 view(s)
11-17-2017,
12:47 PM
tkhunny
replied to a thread
If watermelon weighs 100kg, 99% is water, 1% of water evaporates, then...
in
Pre-Algebra
1) Is kg weight or mass? Does it matter? 2) Forum rules suggest you show YOUR work, first. That matters.
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2 replies | 101 view(s)
11-17-2017,
07:04 AM
tkhunny
replied to a thread
Growth and Decay: population growth is proportional to current population
in
Differential Equations
Well, there's an exponential relationship, there. Let's see you map it out.
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1 replies | 77 view(s)
11-16-2017,
04:18 PM
tkhunny
replied to a thread
WTH is up with Prime Numbers? What purpose do primes serve? In my 40s; really wanna k
in
Arithmetic
Did you cover Triangular Numbers and Square Numbers and Magic Numbers and Imaginary Numbers and Complex Numbers and Transcendental Numbers and Whole...
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5 replies | 149 view(s)
11-16-2017,
04:00 PM
tkhunny
replied to a thread
Question about Lagrange multipliers for maximizing a function with two constraints
in
Calculus
-0,02x -- but that doesn't seem to have bothered anything, since your complain is why this equation even exited. You should not be disturbed that...
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13 replies | 414 view(s)
11-16-2017,
03:43 PM
tkhunny
replied to a thread
Volume of falling sphere below horizontal line as sphere falls past line
in
Calculus
You need some preliminary thoughts. "sits on a straight line" -- So 100% of the sphere is above the line? "below the line" -- Is the sphere...
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6 replies | 147 view(s)
11-16-2017,
12:47 PM
tkhunny
replied to a thread
Question about Lagrange multipliers for maximizing a function with two constraints
in
Calculus
Please show your four partial derivatives.
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13 replies | 414 view(s)
11-16-2017,
12:40 PM
tkhunny
replied to a thread
Getting 0 for a particular solution: r^2*dy/dr = K, r>0, K constant
in
Differential Equations
Okay, that's fine, but: 1) There is no need to produce TWO constants of integration. One will do. 2) Is K(Ar + B) really different from KAr +...
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5 replies | 151 view(s)
11-16-2017,
12:30 PM
tkhunny
replied to a thread
Probability prediction (that investment will go bankrupt in the next year)
in
Finance/Business Math
Wow! We need only 472 different pieces of data to do that. Where are you on this? What have you tried? What class has compelled you to do this?
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5 replies | 148 view(s)
11-15-2017,
10:31 PM
tkhunny
replied to a thread
Getting 0 for a particular solution: r^2*dy/dr = K, r>0, K constant
in
Differential Equations
Why is F inside the parentheses?
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5 replies | 151 view(s)
11-15-2017,
01:10 PM
tkhunny
replied to a thread
Odds Ratio and Confidence intervals: 256 seven-year old children from the UK
in
Probability / Statistics
The terrible treatment you have claimed is merely a reflection of forum guidelines. Please show YOUR work. That is how this works.
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4 replies | 272 view(s)
11-15-2017,
07:59 AM
tkhunny
replied to a thread
Solve 4 + 3 / 4 + x - 1 / 4 = 1
in
Beginning Algebra
Not clear what this is. \dfrac{x+3}{4} + \dfrac{x-1}{4} = 1? Is that it? x + \dfrac{3}{4} + x - \dfrac{1}{4} = 1? Or is that it? In any...
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2 replies | 127 view(s)
11-15-2017,
07:57 AM
tkhunny
replied to a thread
Richard average 83 in 3 classes, 84 in 3 classes. If ave. for non-math is 82, then...
in
Arithmetic
Forum Rules. Please show your work. How is an Average Calculated?
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3 replies | 149 view(s)
11-14-2017,
09:15 PM
tkhunny
replied to a thread
Obedient figures/numbers
in
Intermediate/Advanced Algebra
LHS = Left Hand Side Not a proof. One must show them ALL.
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18 replies | 499 view(s)
11-14-2017,
04:35 PM
tkhunny
replied to a thread
If 550 grams of cheese costs £2.20 how much can you buy with £2.00?
in
Arithmetic
It is ratio time. Calculate the Unit Cost.
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2 replies | 134 view(s)
11-14-2017,
04:33 PM
tkhunny
replied to a thread
Double-, Half-Angle Idents: If tan(pi/8)=sqrt{A}-B, find A,B using half-angle ident.
in
Geometry and Trig
Do you know \tan\left(\dfrac{\pi}{4}\right)?
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2 replies | 93 view(s)
11-14-2017,
04:32 PM
tkhunny
replied to a thread
how many 26 degree agles in a 2017 corner
in
Geometry and Trig
Let's see... "Mischief Managed" Nope, that didn't make it any more clear. Whence came the problem? What section are you studying?
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8 replies | 169 view(s)
11-14-2017,
04:30 PM
tkhunny
replied to a thread
Obedient figures/numbers
in
Intermediate/Advanced Algebra
Nice try, but they are still different species and multiplication is unlikely. So, m(m+1) * n(n+1) = q(q+1) Well, there are only 13 choices for...
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18 replies | 499 view(s)
11-14-2017,
01:44 PM
tkhunny
replied to a thread
Obedient figures/numbers
in
Intermediate/Advanced Algebra
"two figures following each other" First, this is impossible without a closed path (maybe a circle) -- Better definition, please. Second, (Dog...
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18 replies | 499 view(s)
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About tkhunny
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About tkhunny
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"Unique Answers Don't Care How You Find Them." - Many may have said it, but I hear it most from me.
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