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#76 Re: Help Me ! » Linear equations » 2017-04-26 07:49:43
Hi;
What have you tried here?
#77 Re: Help Me ! » Distance » 2017-04-26 07:46:47
If you can define what a negative distance is then we can talk about that.
#78 Re: Help Me ! » Definite exponential integral with argument in square root » 2017-04-26 07:37:59
Hi;
Can you say something about a and b?
#80 Re: Help Me ! » Distance » 2017-04-25 15:52:36
I do not think so. The distance of (2,3) from the y axis is a straight line. There is no right triangle.
#81 Re: Maths Is Fun - Suggestions and Comments » Solids of Revolution by Disks and Washers » 2017-04-25 14:04:04
Hi;
Nice page, I got it!
#82 Re: Help Me ! » Equation » 2017-04-25 13:56:38
We did not use the slope intercept form. We are still plugging x = 0 into x+3y-9=0 to get the y intercept.
#83 Re: Help Me ! » Distance » 2017-04-25 13:54:45
It is not necessary to use Pythagoras on such an easy question.
#84 Re: Help Me ! » Binomial Coefficent Sums » 2017-04-25 09:53:03
Just to interject this though:
The problem of finding simple evaluations of major classes of sums that involve factorials,
binomial coefficients, and their q-analogues, has been completely solved. Sums that have
the rather general form specified in Section 3 can all be done algorithmically, that is to say,
you can do them on your own PC. Your computer evaluates the sum as a simple formula,
if that's possible, and gives you a proof that you can check, or gives you a proof that your
sum cannot be done" in simple closed form, if that is the case.
If you are to start doing lots of these then I suggest A=B and Generatingfunctionology and picking up the appropriate software from those books.
As a beginning course, let us examine the work of the first person to ever attack these sums in a systematic manner, Sister Mary Celine:
#85 Re: Help Me ! » Distance » 2017-04-25 04:09:31
The Pythagorean theorem states that the 3 sides of a right triangle are related by this a^2 + b^2 + c^2. Know how to apply that?
#86 Re: Dark Discussions at Cafe Infinity » 2015 UK General Election » 2017-04-25 04:07:30
Not really. It confuses people having more than one choice.
#87 Re: Help Me ! » Equation » 2017-04-25 04:06:52
The y intercept is where x = 0. So plug in in x = 0 in x+3y-9=0 and solve for y.
#88 Re: Jai Ganesh's Puzzles » General Quiz » 2017-04-25 01:40:12
#89 Re: Jai Ganesh's Puzzles » Oral puzzles » 2017-04-25 01:37:20
#91 Re: Help Me ! » Binomial Coefficent Sums » 2017-04-25 01:22:46
Possibly by snake oil...
#92 Re: Help Me ! » Distance » 2017-04-25 01:05:06
What is the distance of blue line segment?
#93 Re: Help Me ! » Equation » 2017-04-25 00:47:22
I have no y intercept
Do you need the y intercept or not?
#94 Re: Help Me ! » Distance » 2017-04-24 22:38:57
You need the distance formula or pythagoras for that.
#95 Re: Help Me ! » Equation » 2017-04-24 22:37:23
Hi;
That is the correct slope. Did you solve for y in the equation x+3y-9=0? Then you can get the y intercept.
#96 Re: Help Me ! » Distance » 2017-04-24 22:07:24
Hi;
Do not forget to visualize problems by drawing diagrams and plots.
#97 Re: Help Me ! » Distance » 2017-04-24 21:51:14
Hi;
This is a bit tricky to get but I would say the distance from the y axis is 2. I suggest to not abandon a visual approach here. Please check bob bundy's drawing.
#98 Re: Help Me ! » Equation » 2017-04-24 21:36:55
Hi;
There are lots of lines parallel to that one. Start by finding the slope. You do that by putting the equation into standard form y = mx + b