g

l, m, n, o, p,

w, x, y and Z now i know my abc's next time won't you sing with me!! (bored)

Remember what wind is??????

1).Find the co-ordinates of the point A on the line x= -3 such that the line joining A to B(5,3) is perpendicular to the line 2x+5y =12.

2). Using the vertices A(2a,2b), B(-2c, 0), C(2c,0).
(i) prove that the medians of a triangle are concurrent. (a median is a line joining a vertex to a midpoint of the opposite sides; the lines are concurrent if they have a common point of intersection);
(ii) show that the centroid is 2a/3, 2b/3. (a centroid is the point of intersection of the medians).

Sorry little buddy, it was just too long ago to remember how to do that stuff. I could work it out if I tried, but I'd rather go cook myself some dinner and have a beer.

By the way, I haven't been back here since pretending to be James Bondi on page 1. Good to see the thread standard has been kept up.

Its a start?

What i think I will try is

3y^2+4y=6x+7

6y(dy/dx) + 4(dy/dx)=6

(dy/dx)(6y+4)=6

(dy/dx)= 6/(6y+4)

Then sub the x=1.8 into the original, to find out y for that value. Which I get y=1.8587. Put the y into my (dy/dx) equation, getting .396, and that should be the answer?

Pity every time I get it wrong I lose marks, so I'm afraid to enter it.

All this maths stuff reminds me of what I was doing in school when I should have been leatning to kite surf!

I might have been beyond beginner if I'd learnt back then

thourght i might change the subject

kitebored said...

y = -17

really?
this is serious for me. howd you get there , if you dont mind?

ps, is the link related?

Dawn Patrol said...
really?
this is serious for me. howd you get there , if you dont mind?

ps, is the link related?

took link off, was just interesting vid of apparently 22 sec hangtime.. i wanted to embed it , will work on that.

Back to the maths.. you guys really have way too much spare time!

2x+5y=12 is in another way y= (-2/5)x +12/5 so the slope of this line is -2/5.
If this line is perpendicular to line (AB) then, the slope of (AB) is 5/2.

the equation of line (AB) is: Y - Yb = slope (X - Xb) because B is a point of the line
thus y - 3 = 5/2(x - 5)
and if A is a point of x= -3 then it's x-coordinate is -3
let's find its y-coordinate by replacing its x-coordinate in the equation of (AB)

y - 3 = 5/2(-3 -5) which gives you y= -17

and A(-3; -17)

snoidberg said...

hey comon guys lets talk about pea nut

Recent research showed that in a Western community about 1 in 200 children (0.5%) had a reaction to peanut by 5 years of age. Overall about 1-2% of the population have a clinical reaction to peanuts. About 3% of children have a positive peanut allergy test (such as a skin prick test) but only 1/3 of these will develop reactions on eating peanuts. The occurrence of peanut allergy in childhood differs greatly in different countries. Australia is a country with a relatively high prevalence of peanut allergy. If your child has a positive allergy test but has never eaten peanut your doctor will determine the chance of developing a reaction if there is exposure to peanut or peanut containing products.

YAy i got my thing right
man o man i love maths..................................................................................NOT

Wow that was one big jump.

i enjoy peanuts

Then, of course, we have the peanut gallery. A distant relation of the actual peanut, the peanut gallery member generally comes out of the woodwork in winter when there is not much kiting to do and lots of time to banter on seabreeze. These creatures are said to kite and windsurf in the windier summer months, but in the winter have little outlet for their creative energy and spend it all on the chat forums.

Nice maths though kitebored.