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MarkFL
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September 19th, 2018,
14:50
MarkFL
replied to a thread
2.1.6 anoother DE went off the rails
in
Differential Equations
Most of your more recent questions are from courses I never took, and so I would rather more qualified folks reply. :D
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6 replies | 179 view(s)
September 19th, 2018,
14:20
MarkFL
replied to a thread
2.1.6 anoother DE went off the rails
in
Differential Equations
I apologize for replying to this months later...I was just going through the site looking for loose ends I've left. :)
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6 replies | 179 view(s)
September 19th, 2018,
13:47
MarkFL
replied to a thread
2.1.6 anoother DE went off the rails
in
Differential Equations
To follow up, we may write: \frac{d}{dt}\left(t^{-2}y\right)=t^{-3}\sin(t) This does not lead to the solution given by your textbook. Going by...
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6 replies | 179 view(s)
September 19th, 2018,
13:27
MarkFL
replied to a thread
Domain...2
in
Pre-Calculus
To follow up, we get: (0,1)\,\cup\,(1,\infty)
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2 replies | 355 view(s)
September 18th, 2018,
22:36
MarkFL
replied to a thread
Show that set of points form right-angled triangle
in
Geometry
To follow up (which is what we're hoping you will do when given help), we find: m_{\overline{AB}}=\frac{3-(-4)}{2-1}=1 ...
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4 replies | 90 view(s)
September 17th, 2018,
22:38
MarkFL
replied to a thread
AI-assisted math learning for adult (long-term) beginner
in
Pre-Calculus
Unfortunately, I can't help you with your question, but I did want to welcome you back...I happy to hear you have renewed your desire to do some...
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1 replies | 76 view(s)
September 17th, 2018,
14:26
MarkFL
replied to a thread
Show that set of points form right-angled triangle
in
Geometry
Let's begin by plotting the 3 given points: It appears that \(\overline{AB}\) and \(\overline{AC}\) are the legs. Can you show that the...
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4 replies | 90 view(s)
September 16th, 2018,
22:02
MarkFL
replied to a thread
Percent Increase
in
Pre-Algebra and Algebra
Yes, I would write: 100\frac{\Delta A}{A}\%=100\frac{1.2b\cdot1.2h-bh}{bh}\%=100(1.2^2-1)\%=44\%
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10 replies | 160 view(s)
September 16th, 2018,
21:54
MarkFL
replied to a thread
Bacteria Culture
in
Pre-Algebra and Algebra
Taking it from: 2^{\Large\frac{t}{2}}=500 Convert from exponential to logarithmic form: \frac{t}{2}=\log_2(500) ...
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10 replies | 161 view(s)
September 16th, 2018,
15:28
MarkFL
replied to a thread
Percent Increase
in
Pre-Algebra and Algebra
Please wait until you have progress to post, rather than just posting to say you will post later. Such posts needlessly bump threads. ;)
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10 replies | 160 view(s)
September 16th, 2018,
15:18
MarkFL
replied to a thread
Bacteria Culture
in
Pre-Algebra and Algebra
I will await your work...
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10 replies | 161 view(s)
September 16th, 2018,
13:58
MarkFL
replied to a thread
Time To Fill Tank
in
Pre-Algebra and Algebra
As a slightly different way to approach this problem, we can see that working together for 15 hours, the two inlet pipes can fill 8 tanks, and so it...
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7 replies | 117 view(s)
September 16th, 2018,
13:43
MarkFL
replied to a thread
Finding Gradient
in
Geometry
For the benefit of others who may read this thread, I will complete the problem. This will make the thread more useful (hint hint). I posted: ...
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5 replies | 87 view(s)
September 16th, 2018,
12:13
MarkFL
replied to a thread
Lucy and Mel
in
Pre-Algebra and Algebra
I would let \(L\) be the amount of money Lucy had initially and \(M\) be the amount of money Mel had initially. From the information given about...
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3 replies | 65 view(s)
September 16th, 2018,
11:53
MarkFL
replied to a thread
Common Multiple
in
Pre-Algebra and Algebra
Can you show what you've tried or your thoughts on how to begin?
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2 replies | 52 view(s)
September 16th, 2018,
11:47
MarkFL
replied to a thread
Finding Gradient
in
Geometry
We can see that it is a trapezoid. A formula for the area \(A\) of a trapezoid is: A=\frac{h}{2}(B+b) where: h is the height (we see is is 5...
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5 replies | 87 view(s)
September 16th, 2018,
11:16
MarkFL
replied to a thread
Finding Gradient
in
Geometry
What type of plane figure is the given area?
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5 replies | 87 view(s)
September 15th, 2018,
23:18
MarkFL
replied to a thread
Percent Increase
in
Pre-Algebra and Algebra
Based on what you initially posted, and my reply to it, can you hazard another attempt?
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10 replies | 160 view(s)
September 15th, 2018,
21:02
MarkFL
replied to a thread
Bacteria Culture
in
Pre-Algebra and Algebra
Set to population equal to the given amount: 1000\cdot2^{\Large\frac{t}{2}}=500000 Divide through by 1000: 2^{\Large\frac{t}{2}}=500 Can...
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10 replies | 161 view(s)
September 15th, 2018,
01:03
MarkFL
replied to a thread
Subscripts that look like subscripts ...
in
LaTeX Help and Discussion
Try something like: f_{\Large_P} to get: f_{\Large_P}
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2 replies | 92 view(s)
September 14th, 2018,
21:43
MarkFL
replied to a thread
Bacteria Culture
in
Pre-Algebra and Algebra
The population \(P\) at time \(t\) (in minutes) will be: P(t)=P_0\cdot2^{\Large\frac{t}{2}} where \(P_0\) is the initial population.
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10 replies | 161 view(s)
September 14th, 2018,
21:11
MarkFL
replied to a thread
Percent Increase
in
Pre-Algebra and Algebra
No, that would be a way to begin computing the amount of decrease of the area if both length and width were decreased by 80%.
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10 replies | 160 view(s)
September 14th, 2018,
14:44
MarkFL
replied to a thread
Find the equation of the line
in
Pre-Algebra and Algebra
Okay, when we have a line of the form: y=k Where \(k\) is some real number, what does the graph of such a line look like? By the way,...
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6 replies | 90 view(s)
September 14th, 2018,
14:26
MarkFL
replied to a thread
Find the equation of the line
in
Pre-Algebra and Algebra
Oops...I didn't catch that. Good eye! :)
see more
6 replies | 90 view(s)
September 14th, 2018,
12:57
MarkFL
replied to a thread
Find the equation of the line
in
Pre-Algebra and Algebra
Hello, and welcome to MHB! (Wave) What will the slope of the requested line be?
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6 replies | 90 view(s)
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September 20th, 2018
19:03 -
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Problem Of The Week # 324 - Sep 20, 2018
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Here is this week's...
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Re: Problem Of The Week # 323 - Sep 14, 2018
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This week's problem was...
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To follow up, we get: ...
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Re: 2.1.6 anoother DE went off the rails
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The original problem is...
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let me check I had to...
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To follow up, we may...
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September 19th, 2018
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The problem statement,...
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