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• Yesterday, 09:37 PM
So you are trying derive an expression for velocity - while you are given the position as a function of time. How was it explained in your class...
4 replies | 34 view(s)
• Yesterday, 08:07 PM
Do you know how to differentiate using calculus?
4 replies | 34 view(s)
• Yesterday, 03:31 PM
Actually the question is to prove: \displaystyle{\sum_{k=0}^r \left = (n+m)C_r} Go to http://mathforum.org/library/drmath/view/54223.html ...
8 replies | 89 view(s)
• 09-21-2018, 08:40 PM
x3 + 5x2 - 6x = x * (x2 + 5x - 6) = x * (x + 6) * (x - 1) ..... continue....
8 replies | 89 view(s)
• 09-21-2018, 12:06 PM
Use law of Cosines. If you are still stuck, reply back showing work.
5 replies | 78 view(s)
• 09-21-2018, 09:44 AM
If the vertices of the triangle are A, B & C,: Can you describe which sides are 9 cm? Do you know laws Sines and Cosines for triangles?
5 replies | 78 view(s)
• 09-21-2018, 06:38 AM
Sequences like: 1, 4, 7, 10, ..... Or a, a + d, a + 2d, a + 3d ...... are said to be in Arithmetic Progression (AP) with constant...
7 replies | 159 view(s)
• 09-20-2018, 05:00 PM
Subhotosh Khan replied to a thread Logarithm in Pre-Algebra
log(H) does NOT mean log (multiplied by) (H) Before that can you please tell us: what does the statement 3^(4) = 81
4 replies | 113 view(s)
• 09-19-2018, 10:50 AM
What did you get? Did you factor 'n' out? What did you get from that?
5 replies | 154 view(s)
• 09-19-2018, 08:42 AM
Hint: Factor out n from the expression. Then factor out (n-1) from the resulting polynomial. Please share your work with us ...even if you know...
5 replies | 154 view(s)
• 09-17-2018, 05:21 PM
Now you need to subtract the area of the triangle to calculate the "pink" area.
6 replies | 88 view(s)
• 09-17-2018, 08:17 AM
Calculator? .... just kidding What are your thoughts? Can you express sin(x) in terms of cos(x)?
2 replies | 64 view(s)
• 09-16-2018, 03:37 PM
Calculate the lengths of AB, BC and CA - then use Pythagoras's theorem to check for right angle. What is the total score of the student now? ...
3 replies | 89 view(s)
• 09-15-2018, 04:01 PM
By that - are you referring to the LENGTH of the diameter? By that - are you referring to the LENGTH of the chord?
7 replies | 133 view(s)
• 09-15-2018, 01:35 PM
Polygons are 2-D structure. Solid bodies are 3-D structure.
5 replies | 99 view(s)
• 09-15-2018, 01:30 PM
A closed polygon should have cyclic order by definition of being closed.
5 replies | 99 view(s)
• 09-15-2018, 01:27 PM
Take "log" of both sides and continue. If you are still stuck, please reply back with your work from my suggestion.
6 replies | 122 view(s)
• 09-15-2018, 10:06 AM
There are infinite possible solution for this equation! Did you post the complete problem?
5 replies | 145 view(s)
• 09-15-2018, 09:50 AM
If I were to do this problem, I would write out the first few terms (~4) for each series and observe if any grouping or elimination is possible.
2 replies | 158 view(s)
• 09-15-2018, 09:15 AM
From your attempt I am assuming the actual equation is: 2x/(x+6) + 1/(x-1) = 2..................... those parentheses are super important to make...
2 replies | 71 view(s)
• 09-14-2018, 11:39 AM
Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll start with the definitions. ...
4 replies | 147 view(s)
• 09-12-2018, 04:19 AM
One of the ways one can determine - which number is bigger between two - is to use subtraction. Can you subtract decimal numbers?
21 replies | 488 view(s)
• 09-11-2018, 12:03 PM
This is fairly simple ratio problem - where are you stuck? Please share your work/thoughts with us - so that we know where to start.
2 replies | 107 view(s)
• 09-09-2018, 06:18 PM
How many - total - friend requests were produced?
1 replies | 52 view(s)
• 09-08-2018, 12:09 PM
That will be dictated by your production system - every system will have different combination of multipliers (weighting factors). Your...
10 replies | 358 view(s)
• 09-07-2018, 07:20 PM
Can you graph: f(x) = 3
1 replies | 101 view(s)
• 09-07-2018, 01:37 PM
Yes you are correct on both counts - as far as "what you have posted".
6 replies | 254 view(s)
• 09-07-2018, 11:22 AM
Complex number - according to my definition - can be expressed as "a + i * b" , where: i = sqrt and a = any real number (no imaginary part)...
7 replies | 201 view(s)
• 09-06-2018, 07:36 AM
That was a "sixer" for sure!! Denis, I got another ally here!!!
2 replies | 70 view(s)
• 09-06-2018, 07:17 AM
However: An "even" number with "even" exponent will result in "even" number. 2^0 = 1 ........ Now what??
24 replies | 704 view(s)
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