The water will cool down after putting in the stone right? So the final temperature of water should be 50-T because T<50.

As for the stone, its final temperature will increase so T-28 for T>28.

[T = final temperature]

ohh.the water will cool the stone, so thats why its final temperature is T>28. i get it now. thank u !

Not water cool the stone. When they achieved thermal equilibrium, their temperature will be same right? Imagine you put ice into hot water, the ice melts and the water cool. Water cool down BECAUSE of ice.

Thermal equilibrium is the best word.the higher temp will reduce while the lower one will increase..

Q=tita...duno hw to type
so mcQ=mcQ
mc(50-T)=mc(T-28)

i didnt raed the question but i think is lik this...

the ans for the add math ques is just 8

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Added on November 1, 2008, 10:59 pmi am just form 4 la wei

This post has been edited by vick5821: Nov 1 2008, 10:59 PM

haha I'm right

but why i can get 4.8 and 8?

show your steps

just like others forumer

anyone from mara here?? pm me.. I NEED YOU!!

Wow,you also trust Mara ah?everyone is talking about MARA now..

oops haha

vick can ask your add math teacher what we did wrong?

Hmm...I tried substituting p = 4.8 into the equation. Somehow it's also correct.
You will get 2.2630... = 2.2630...
p = 8 is also correct:
LHS = 3 and RHS = 3 too.
Possibly both 4.8 and 8 are correct?

what about mara.
why suddenly the topic about mara?

Guys pls help me math question

i know i should draw -8 at y axis but what about 3 over 2 x ??where should i draw i don understand this answer - -


Attached thumbnail(s)

There will be an x-intersect at -16/3. The graph didn't show the x-intersect (maybe not enough space?)

erm, the straight line you have to draw is actually,
y=-3/2x-8
where -3/2 is m
and -8 is the c
follow the equation y=mx+c

Nonono,it is not the way to do it..

you have to make a range box first like X=-2 and X=4
fill in the both x into the equation y=-8-3/2 x and find the y...then dot it and draw straight line loh..

Hard to explain here..

You can also just find two coordinates to draw a straight line.
You know that when x = 0, y = -8. (0,-8)
Now lets say when x = 2, y = ?.
You should get -11. So, (2,-11).
Draw a straight line connecting these two points and you're done.
(A range box method is also suitable, as stated by ff8ong.)

is there a good website where i can find like plans/elevation for various geometric shape? im looking at f5 maths chapter 10.
whats a good term i can search for, in yahoo.
after searching like 20minutes i still cant find what i wanted