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• Today, 01:38 PM
I guess the student just has to ask the teacher what the question means. Either something has been said in class but not heard, or the teacher is...
5 replies | 75 view(s)
• Today, 10:58 AM
I tried searching for "structures maths" and found nothing to suggest it is a common name for a topic or course. Clearly the question assumes the...
5 replies | 75 view(s)
• Yesterday, 03:49 PM
Well, the thread title is " Indefinite integral with continous funtions problem"; and in order to have the stated (continuous) derivative f(x), F(x)...
13 replies | 181 view(s)
• Yesterday, 02:07 PM
You'll have to put this C2 into the second case, and then find C1 to make the function continuous. (It is not -8 this time.) THEN you can evaluate...
13 replies | 181 view(s)
• Yesterday, 11:17 AM
If the context were mathematical (say, they were about to do a calculation based on the proportionality statement, and didn't already have the...
16 replies | 268 view(s)
• 12-13-2018, 08:33 PM
I initially thought we'd need to know what kind of numbers are allowed, and whether they can repeat, but when I actually tried it, I found the same...
8 replies | 153 view(s)
• 12-13-2018, 07:54 PM
Please don't post links to that site, which is forbidden. Here is your image: Your answer is F(x) = { x^2 - x - 8, x <= 1 .........{...
13 replies | 181 view(s)
• 12-13-2018, 05:52 PM
I think I told you what to do. Please try, and show me your work. (Presumably you have been taught what to do, as well.) The first step, as I...
13 replies | 181 view(s)
• 12-13-2018, 05:00 PM
It doesn't make much sense to me. The page says at one point, Is there anything about the curve that you think is not true to the mathematical...
2 replies | 119 view(s)
• 12-13-2018, 04:55 PM
I think you've misunderstood the role of F(4)=-8 in the problem. It is not just a check. Any function has many antiderivatives, not just one. They...
13 replies | 181 view(s)
• 12-13-2018, 03:16 PM
The key idea is that you have to do exactly 60 multiplications or divisions. (I missed that at first.) For example, you can get 12 by multiplying...
10 replies | 187 view(s)
• 12-13-2018, 10:57 AM
Can you show your work, so we can see why you think it didn't lead to the correct answer (or correct form)? It isn't clear what you are lacking.
3 replies | 135 view(s)
• 12-13-2018, 10:51 AM
I would agree. It is a linear equation with an added restriction, not a true linear equation.
1 replies | 134 view(s)
• 12-12-2018, 11:18 PM
The difference comes in moving the exponent outside of the log. The 16th power is always positive (except at x=7), so the domain of h is x≠7, while...
6 replies | 200 view(s)
• 12-12-2018, 07:58 PM
Have you started? In order to help you complete it, we'll need to know where you need help. If you don't have a picture of your work to send us,...
2 replies | 173 view(s)
• 12-12-2018, 06:56 PM
Actually, that condition is not required; if C increases from 1/4 to 1/2 (doubling), A decreases (halving). The restriction is that all numbers are...
16 replies | 268 view(s)
• 12-12-2018, 02:11 PM
I can read these, after enlarging and rotating; but I can't tell what help you need. There are a lot of problems here, and nothing to show what got...
16 replies | 297 view(s)
• 12-12-2018, 10:17 AM
I don't think "parametrize" means what you think it means. Here is an explanation of what I would mean by it. It doesn't seem very relevant. It is...
4 replies | 151 view(s)
• 12-11-2018, 10:52 PM
In addition to showing the complete statement of the problem, and the work you are unable to understand, please tell us your background. This...
3 replies | 145 view(s)
• 12-11-2018, 10:43 PM
I think you're saying that you were asked to find the sides marked with question marks, and you wanted to find the sides of the rectangle that you...
6 replies | 198 view(s)
• 12-11-2018, 04:32 PM
Do you have reason to think there is enough information to solve this? I see nothing to prevent you from moving the right side to any desired...
6 replies | 198 view(s)
• 12-11-2018, 01:00 PM
Here is a better copy of your picture: Now please state the problem in words, and tell us what you have done to solve it. We need to know what...
6 replies | 198 view(s)
• 12-11-2018, 12:52 PM
Let's start with what you DO know. Can you sketch a graph of this distribution? Where will the peak be? How far from the peak is each of the...
1 replies | 138 view(s)
• 12-11-2018, 10:47 AM
Please state the exact wording of the problem you are trying to answer. It is very important! If you were asked to find the inverse function (that...
15 replies | 446 view(s)
• 12-11-2018, 10:33 AM
If you are specifically asking only about this line, Here we have replaced |y - 1| by 1 - y and |x + 3| by x + 3, since we are interested in x and...
6 replies | 345 view(s)
• 12-10-2018, 10:42 PM
It sounds like you have never seen a derivation of the combination formula (or never paid attention). Rather than reinventing the wheel by trying to...
3 replies | 200 view(s)
• 12-10-2018, 10:32 PM
I think your direct question has been answered; are you satisfied with the idea of cross-multiplication? Now we are starting to get confused by...
7 replies | 228 view(s)
• 12-09-2018, 10:35 PM
Are you aware of the shortcut for compound interest? Rather than calculate the interest as i = Prt and then adding that to P, you can combine that as...
10 replies | 275 view(s)
• 12-09-2018, 02:48 PM
Earlier today, I had trouble getting to the site, but just now I got this page with no trouble, then I couldn't get to another page. Hopefully it's...
12 replies | 413 view(s)
• 12-09-2018, 01:45 PM
I agree with others that discovering that one can discover ideas in math by oneself is great, especially if there is some sort of understanding of...
12 replies | 413 view(s)
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I was a software engineer for many years, and have been teaching at a community college since 2004. Since 1998, I was a part of Ask Doctor Math (http://mathforum.org/dr.math/ and now http://themathdoctors.org/).
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