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• Yesterday, 01:08 PM
ksdhart2 replied to a thread Simplify a Surd in Beginning Algebra
Hmm... How curious. I often find that expressions written on this site are ambiguous or incorrect due to missing grouping symbols. However, in this...
4 replies | 68 view(s)
• Yesterday, 01:19 AM
The general formula for the future value of an investment subjected to compound interest is given by: F = P \left( 1 + \dfrac{r}{n} \right)^{nt} ...
1 replies | 62 view(s)
• 06-15-2018, 12:55 PM
What you've done so far is good. That takes care of the easy part of plugging things in. Next comes the slightly more difficult (but not too onerous,...
4 replies | 120 view(s)
• 06-12-2018, 08:08 PM
If a value "satisfies a cubic equation" means that when you plug that value to the cubic, you get a true equation. So let's do that now. (1 +...
2 replies | 121 view(s)
• 06-10-2018, 09:22 PM
You're probably going to feel real silly when you see it, but your answer and the book's answer are the same, just written differently. Consider your...
16 replies | 483 view(s)
• 06-04-2018, 12:58 PM
Well, the fact that you got a 3x3 matrix for C is a good sign that you might be on the right track. However, without seeing your answer or any of the...
1 replies | 105 view(s)
• 06-04-2018, 04:29 AM
Suppose the White family has the following ages: Mr. White: 39 Mrs. White: 37 Son 1: 13 Son 2: 7 Son 3: 3 Son 4: 1
2 replies | 174 view(s)
• 06-02-2018, 04:43 PM
Your conclusion that A and B must be square matrices of the same size is correct, although perhaps an easier way to get there would be to consider...
6 replies | 300 view(s)
• 06-01-2018, 12:06 PM
Assuming that you were given literally no information other than what you included in your post, and thus you don't know anything about the...
17 replies | 533 view(s)
• 05-27-2018, 01:39 PM
Okay, so this is the problem as I retrieved it from the linked image hosting site: \phi = \dfrac{ad-bc}{\sqrt{(a+b)(a+c)(b+d)(c+d)}} ...
3 replies | 180 view(s)
• 05-25-2018, 01:29 PM
Well, if you're doubting your solution, you can always check it to see if it meets all of the criteria. Let's quickly remind ourselves of the...
5 replies | 249 view(s)
• 05-23-2018, 01:00 PM
Unfortunately, nothing you did on #12 is correct. You appear to have just arbitrarily decided that the triangle is a 30-60-90 triangle, but this is...
8 replies | 372 view(s)
• 05-22-2018, 09:24 PM
Typically a good place to start with problems like these is just to write down every piece of information you're given and then see what else you can...
9 replies | 395 view(s)
• 05-22-2018, 12:35 PM
It looks like the problem statement is written in black, and your work is in red. So the problem statement is: \left(P \vee \neg(\neg(\neg Q))...
2 replies | 144 view(s)
• 05-21-2018, 12:26 AM
Hm. A very interesting math puzzle. At first I was completely stymied and thought maybe the trick was that there wasn't an answer. But then I...
3 replies | 321 view(s)
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