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HallsofIvy
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HallsofIvy
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Yesterday,
23:49
MarkFL
replied to a thread
Find 2 Numbers
in
Pre-Calculus
Yes, that's correct. (Yes)
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2 replies | 17 view(s)
Yesterday,
23:29
MarkFL
replied to a thread
Students Fear Word Problems
in
Chat Room
If I had to point my finger in any one direction, it would be at parents.
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11 replies | 112 view(s)
Yesterday,
21:33
MarkFL
replied to a thread
15.1.25 Evaluate the following double integral over the region R
in
Calculus
The region $R$ is a rectangle having the vertices: (0,1),\,(1,1),\,(1,-1),\,(0,-1) One way we can compute the volume is: ...
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4 replies | 54 view(s)
Yesterday,
19:41
MarkFL
replied to a thread
logs
in
Pre-Algebra and Algebra
Okay, we are given: \ln\left(x-\frac{1}{x}-3\right)=2 Converting from logarithmic to exponential form, we have: x-\frac{1}{x}-3=e^2 ...
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2 replies | 23 view(s)
Yesterday,
15:26
MarkFL
replied to a thread
15.1.25 Evaluate the following double integral over the region R
in
Calculus
As for the $\LaTeX$, look under the "Calculus/Analysis" section of our Quick $\LaTeX$ tool. You will find it, which gives the code: ...
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4 replies | 54 view(s)
Yesterday,
10:48
MarkFL
replied to a thread
The Fonz and Geometry
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Chat Room
Yes, and I was just pointing out that there can be other reasons a student fails besides lack of innate ability to understand the material, or an...
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5 replies | 65 view(s)
Yesterday,
10:18
MarkFL
replied to a thread
The Fonz and Geometry
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If a child's parents consistently put a child down, then I think this can have negative consequences on the child. I think there are a great many...
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5 replies | 65 view(s)
Yesterday,
08:09
HallsofIvy
replied to a thread
The Fonz and Geometry
in
Chat Room
You give us information about "Henry Winkler" and ask about "Fonzie". I say that "Fonzie" and "Henry Winkler" are not the same person. We cannot...
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5 replies | 65 view(s)
August 22nd, 2017,
23:08
MarkFL
replied to a thread
Students Fear Word Problems
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Chat Room
I disagree with this...I think it is the societal attitude that it's okay to fail at math that is part of the problem. Someone says to their friends,...
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11 replies | 112 view(s)
August 22nd, 2017,
22:23
MarkFL
replied to a thread
Probability of 3 people ending up on same team?
in
Basic Probability and Statistics
If we have 2000 people, 300 of which are women, then the probability that all 300 women will be on the same team is given by: P(A)=\frac{{1700...
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5 replies | 52 view(s)
August 22nd, 2017,
22:01
MarkFL
replied to a thread
Probability of 3 people ending up on same team?
in
Basic Probability and Statistics
I think your second method is correct. Suppose we call the teams $X$ and $Y$...and now we need only look at one team, so let's look at team $X$. If...
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5 replies | 52 view(s)
August 22nd, 2017,
19:04
MarkFL
replied to a thread
Solar Eclipse 2017
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Chat Room
Yesterday during the big event, we had pervasive heavy cloud cover and intermittent rain. Today, sunny and clear all day. Story of my life...(Giggle)
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8 replies | 234 view(s)
August 20th, 2017,
01:29
MarkFL
posted a
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Hey Peter! (Wave) I edited your post to remove the duplicate content. Sorry for the late reply, I was busy "powering through" a tedious 3 hour...
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August 17th, 2017,
02:10
MarkFL
replied to a thread
231.12.3.65 Determine the smallest distance between a point and a line
in
Calculus
Small quibble...axis of symmetry is: t=-\frac{1}{105} So, since the parabola opens up, the vertex is a minimum, so the minimum distance will be...
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8 replies | 177 view(s)
August 17th, 2017,
00:59
MarkFL
replied to a thread
231.12.3.65 Determine the smallest distance between a point and a line
in
Calculus
For a parabola of the form: f(x)=ax^2+bx+c We know the axis of symmetry is at: x=-\frac{b}{2a} So, for:
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8 replies | 177 view(s)
August 16th, 2017,
22:42
MarkFL
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Welcome Threads
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Overview: This product is designed to auto-post a welcome thread for all new users once they have completed all verifications, and/or returning...
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0 replies | 29 view(s)
August 16th, 2017,
21:58
MarkFL
replied to a thread
231.12.3.63 Determine the smallest distance between point and line
in
Calculus
Isn't this question a duplicate of the following? 231.12.3.65 Determine the smallest distance between a point and a line
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1 replies | 45 view(s)
August 14th, 2017,
01:09
MarkFL
replied to a thread
Solar Eclipse 2017
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Chat Room
I was just reading about how tree leaves can form "pinhole cameras" and the eclipse can be seen in their shadows:
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8 replies | 234 view(s)
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Showing Friends 1 to 10 of 10
August 23rd, 2017
18:35 -
Rido12
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Re: The Fonz and Geometry
by
HallsofIvy
You give us information...
08:05 -
HallsofIvy
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Re: Questions regarding writing equations when given graphs
by
skeeter
http://mathhelpboards.com...
August 16th, 2017
23:13 -
karush
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Re: 231.12.3.65 Determine the smallest distance between a point and a line
by
HallsofIvy
Any line can be written...
August 13th, 2017
09:03 -
RTCNTC
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Re: Probability of Event A then B
by
HallsofIvy
Basically, you keep...
August 12th, 2017
14:13 -
RTCNTC
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Re: Probability of 2 Green Marbles
by
HallsofIvy
Gilligan has 16 green...
August 11th, 2017
01:21 -
Peter
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Re: Density of the Irrationals in R ... Corollary 2.1.39 and Exercise 2.1.40 ... ...
by
HallsofIvy
Yes, assuming that you...
August 9th, 2017
21:07 -
Peter
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Re: Density of the Irrationals in R ... Corollary 2.1.39 and Exercise 2.1.40 ... ...
by
HallsofIvy
The main theorem,...
12:35 -
Ackbach
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Re: Density of the Irrationals in R ... Corollary 2.1.39 and Exercise 2.1.40 ... ...
by
HallsofIvy
The main theorem,...
August 7th, 2017
14:30 -
lfdahl
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Re: true or false statement
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HallsofIvy
Here's a famous...
12:06 -
I like Serena
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Re: true or false statement
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HallsofIvy
Here's a famous...
10:09 -
MarkFL
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Re: true or false statement
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HallsofIvy
Here's a famous...
09:49 -
Albert
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Re: true or false statement
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HallsofIvy
Here's a famous...
August 3rd, 2017
14:02 -
HallsofIvy
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Re: Negative numbers with fraction problem
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MarkFL
Hey guys, I am seriously...
July 31st, 2017
07:16 -
lfdahl
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Re: 16 Players Prediction Problem
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HallsofIvy
I'm not clear what you...
July 30th, 2017
08:23 -
Peter
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Re: Sum of a rational number and an irrational number ...
by
HallsofIvy
No need for "Dedekind...