Maths ORD Level

James_LWAU

Can someone show me how to do a simultaneous equation?

Will the formula tables be the same as the ones I bought in the shop?

ajjmk

gimi an example & il use it to explain it to you

..if your tables are the browny ones then yes, if theyr the blue ones then therel be a few minor changes..

James_LWAU

Solve for x and y

x-y=1
x squared + y squares



Does anyone know what the percent rate for failure is for ORD maths:o

lucybrown

under 38%

Professional Griefer

James_LWAU wrote: »

Can someone show me how to do a simultaneous equation?

Will the formula tables be the same as the ones I bought in the shop?

say 2x + 4y = 20
x + 8y = 8

You multiply the bottom line by 2, so you can cancel the X's. Or you could do the Y's two. Make sure to change one of the lines, by multiplying by -1 if the numbers you're canceling are the same sign.


2x + 4y = 20
2x + 16y = 16

I'm gonna change the bottom line. so its now -2x -16y = -16

The 2's cancel, -12y = 4
-y = (1 over 3)
y = -(1 over 3)

Sub the Y value into one of the equations.
2x + 4(1 over 3) = 20
2x =18.6666
x = 9.3333

I'm sorry that was a horrible example. But hopefully you get the drift of what to do.

James_LWAU

Got 31 % in the pres but I didn't do the option question on paper 2 and didn't answer 2 of the calculus question so hoping to scrape a pass fingers crossed.

Do you get extra marks for neatness btw?;)

dyeti

James_LWAU wrote: »

Solve for x and y

x-y=1
x squared + y squares



Does anyone know what the percent rate for failure is for ORD maths:o

12% last time I read.

James_LWAU

Cheers buddy

lucybrown

i got 25% in mocks im so ****ed......i hate maths im so **** at it......i hope its easy

haha no u dont unfortunately!

and the pass rate certainly isnt 12%!!!!!!!

starryeyes122

got 36% in the pre so im prayin to passs!!! 12% is pass rate??? lmao

Professional Griefer

James_LWAU wrote: »

Solve for x and y

x-y=1
x squared + y squares



Does anyone know what the percent rate for failure is for ORD maths:o

Oh this, my bad.

x = 1 + y
Put this into the equation with the squares.
(1 +y)^2 + y^2 = 0
1 + 2y + y^2 + y^2 = 0
2y^2 + 2y + 1 = 0
(y + 1)(y + 1) = 0
y = -1

x + (-1) = 0
x = 1

lucybrown

no unfortunately its not

ajjmk

James_LWAU wrote: »

Solve for x and y

x-y=1
x squared + y squares = 0

x - y = 1
x = y + 1

you plug that into
x squared + y squared = 0

it turns into
(y + 1)squared + y squared = 0

multiply out..
y squared + 2y + 1 + y squared = 0

tidy up
2y squared + 2y + 1 = 0

then work it out as a normal equation find the roots, solve for y, plug your answers back into x = y + 1 to solve for x..

jumpguy

James_LWAU wrote: »

Can someone show me how to do a simultaneous equation?

Will the formula tables be the same as the ones I bought in the shop?

If you've the tables with the blue cover, then there are some very minor changes made, and errors corrected. Tbh, it's quite minor altogether and the changes can be found on www.examinations.ie .

The brown cover ones are exactly what you'll get in the exams.

10.3% of candidates failed pass maths last year (but 89.7% passed! )

nijel

what questions are ye doing???
i hope to do 1 2 3 4 7 6/8

James_LWAU

My teacher told us to focus on 2006 and 2008 paper both weren't too bad IMO.

Do you get extra marks for neatness?

poppers

Check out how past papers were markerd here

http://www.examinations.ie/index.php?l=en&mc=en&sc=ep&formAction=subject

Professional Griefer

nijel wrote: »

what questions are ye doing???
i hope to do 1 2 3 4 7 6/8

I'm gonna do all of them.
And you?

aimerlans

i'm gonna do 1,2,3,4,6,7 & 8

Conor108

I'm gonna do 2,3,4,5,6 and 7. And If I have time I'll do 1 & 8

LepreGnome

Conor108 wrote: »

I'm gonna do 2,3,4,5,6 and 7. And If I have time I'll do 1 & 8

Dude . . . Why would you not do 1 in the first place Arithmatic is the easiet part of the whole leaving cert.

Conor108

Yeah I prefer the other ones though and I probably will have time so that'll be an extra question