Hi all, i have some trouble over math. I forgotten all the thing i learn. If you are free, mind teaching me some math?
I taking N'level this year, i would like to post up some question to ask for help.
1 -
In a city, electricity charges are calculated as follows:
A fixed charge of $24 plus 25 cents per unit of electricity used. When n of
electricity are used, the electricity charge is $A.
(a) Calculate the electricity charge when 50 units of electricity is used. [1]
(b) If the electricity charge is $44, calculate the number of units of electricity
used. [2]
(c) Write down a formula connecting the electricity charge, $A and the
number of units n, of electricity used.
--------------------------------
P.S, I'm a NT student, i was trying to take NA paper during my N'lvl. I sign up for it,
and realise it wasnt very easy. The question above is a NA question.
Hi, welcome to Homework Forum for your first post.
a) cost of 50 units = $24 + $0.25 * 50 = $36.50
b) fixed charge = $24
$44-$24 = $20
Number of units used = $20 / $0.25 = 80 units
c) $A = $(24 + 0.25n)
Hope it helps :D
Good luck for your exams. And work hard. Ganbatte!
It definately help me alot, i would like to post all my enquires here as it help me if i lost my notebook. It can be my references next time too. Is it ok?
3-
(a) Solve the following equation, giving your answers correct to 2 decimal places
where necessary.
*(it is Xsquare) --> 8x^2 - 7x + 1 = 0 [3]
(b) Solve the following equation.
1 4 x
----------- + ---- = ---------
x + 3 5 4 - x [4]
Originally posted by BuIl:It definately help me alot, i would like to post all my enquires here as it help me if i lost my notebook. It can be my references next time too. Is it ok?
3-
(a) Solve the following equation, giving your answers correct to 2 decimal places
where necessary.*(it is Xsquare) --> 8x^2 - 7x + 1 = 0 [3]
(b) Solve the following equation.
1 4 x
----------- + ---- = ---------
x + 3 5 4 - x [4]
get a blog or something.
Originally posted by skythewood:get a blog or something.
Yes, blog help
But if i put everything in one post here, it will make it look neatier, and i can get positive reply from the people here. Why not?
It definately better than blog or what.
Originally posted by BuIl:Yes, blog help
But if i put everything in one post here, it will make it look neatier, and i can get positive reply from the people here. Why not?
It definately better than blog or what.
go ahead.
Originally posted by BuIl:It definately help me alot, i would like to post all my enquires here as it help me if i lost my notebook. It can be my references next time too. Is it ok?
3-
(a) Solve the following equation, giving your answers correct to 2 decimal places
where necessary.*(it is Xsquare) --> 8x^2 - 7x + 1 = 0 [3]
(b) Solve the following equation.
1 4 x
----------- + ---- = ---------
x + 3 5 4 - x [4]
a) Use the formula x = [-b +- sqrt(b^2 - 4ac)] / 2a
b) Is there something after the 4 -?
Anyway to solve this question, just multiply all the denominator to the numerator.
Eg a /b + c/d = e/f
a X d X f + c X b X f = e X b X d
adf + cbf = ebd
Thank dkcx,
the formula you provide is very useful for me, i go rest first. Bb all
No problem. Maths just requires more practice and it can be done. Feel free to ask any questions you have but don't expect spoon feeding of answers all the time. Its best to learn with hints than all the working done for you :)
I'm not very sure if any of the O level E maths syllabus topics are in N level, but perhaps you could try my website for a few extra questions to practice