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Maths question :)

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3x+2y = 8 2x+5y = -2 Anyone? :) Read More
Met-Cast Avatar
7y, 1m agoPosted 7 years, 1 month ago
3x+2y = 8
2x+5y = -2

Anyone? :)
Met-Cast Avatar
7y, 1m agoPosted 7 years, 1 month ago
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#1
that was on my maths gcse paper today

x= 4
y= -2
#2
x=4 y=-2
#3
3x+2y=8 (times by 2)
2x+5y=-2 (times by 3)

6x+4y=16
6x+15y=-6
take away.
-11y=22
y=-2

2x+5y=-2 (substitute the y you've found into one of the previous equations)
2x + -10=-2
2x=8
x=4
#4
You know there's no question right, therefore i made my own.

here is the answer.

3x+2y = 8
2x+5y = -2
x+8y = -12
banned#5
spot_a_deal
that was on my maths gcse paper today

x= 4
y= -2


daughter says thats one she got right then
#6
Took this maths paper earlier too, got x= 4 and y=-2 as far as I can remember!
How did you guys find it?
#7
sassie
daughter says thats one she got right then


lol i feel better about that now as well then after seeing this thread and knowing that your daughter got it right as well looool
#8
weirdwilli
Took this maths paper earlier too, got x= 4 and y=-2 as far as I can remember!
How did you guys find it?


I found it really good! i got scared with the last question cuz i found it a tad easy and thought i got it wrong lol! Spent about 20 mins at the end just being bored and going through it umpteen times loool
how did you find it?
#9
Ah same I had it too :p I made the ys the same because in all of our practices we never had to put the x's the same :/ I worked my way around it until I got 4 for x and some how -2 for y but crossed both answers out although the 4 is still in my working out.

Thanks guys :)

What did you get for the last question?
#10
Im slow today.

3x+2y = 8
2x+5y = -2

x = 4
y = -2

3x is 34 or 3x4?
2y is 2-2 or 2x-2?
#11
Met-Cast
Ah same I had it too :p I made the ys the same because in all of our practices we never had to put the x's the same :/ I worked my way around it until I got 4 for x and some how -2 for y but crossed both answers out although the 4 is still in my working out.

Thanks guys :)

What did you get for the last question?


welcome
i got something like 61 or something
what did you get?
#12
bout tree fiddy
#13
spot_a_deal
that was on my maths gcse paper today

x= 4
y= -2


spot_a_deal
welcome
i got something like 61 or something
what did you get?


Alot of people got 32? Which is what I got. I just put it cause it was the last minute. I put lots of working out (breaking down the 5 marks) You get 1/2 marks for just the answer i'd say.
#14
spot_a_deal
I found it really good! i got scared with the last question cuz i found it a tad easy and thought i got it wrong lol! Spent about 20 mins at the end just being bored and going through it umpteen times loool
how did you find it?

Yeah I thought it was pretty reasonable! Fingers crossed for the calculator being similar :thumbsup:
Met-Cast

What did you get for the last question?

I got 29 degrees for the circle theorems one, pretty sure it was right as most of my mates got the same answer ;-)
banned#15
Met-Cast
Alot of people got 32? Which is what I got. I just put it cause it was the last minute. I put lots of working out (breaking down the 5 marks) You get 1/2 marks for just the answer i'd say.


daughter got 32, she says thats two down - lol
#16
Met-Cast
Alot of people got 32? Which is what I got. I just put it cause it was the last minute. I put lots of working out (breaking down the 5 marks) You get 1/2 marks for just the answer i'd say.


:S
duno i managed to work it out weirdly i think, thats why i think i flopped that question lol
#17
Well not sure no worries guys :). Just concentrate on your future exams :thumbsup:. Im basically done after this week although i'll have 2 more but only 1 each week.
#18
I've got 8 more just this week! Then two next week, and I'm all done :)
#19
weirdwilli
I've got 8 more just this week! Then two next week, and I'm all done :)


Ah ive only got 6 this week :p. I done some before the holidays
#20
i've got 4 more next week
2 the week after
and 3 the week after that!
#21
Met-Cast
Alot of people got 32? Which is what I got. I just put it cause it was the last minute. I put lots of working out (breaking down the 5 marks) You get 1/2 marks for just the answer i'd say.


weirdwilli
Yeah I thought it was pretty reasonable! Fingers crossed for the calculator being similar :thumbsup:

I got 29 degrees for the circle theorems one, pretty sure it was right as most of my mates got the same answer ;-)



look at this
http://www.bbc.co.uk/schools/gcsebitesize/maths/shapes/circles2hirev10.shtml

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