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Maths paper 1, last question
Junior Cert Mathematics — 11/06/16 23

What did everyone get for c in the last question

Daniel_7788 — 10/06/16
180
darraghob — 10/06/16
i got: a = 20 b = -120 c = 180 im not entirely sure its right but when i checked with my friend after he said he got the same
sorecauvanesa — 10/06/16
I got 180 too I hope it's the right answer
Daniel_7788 — 10/06/16
And I got 30 and -30 for a and b not sure what order
caolanf — 10/06/16
I got a=20, b=-120 and c=180
G Kennedy — 10/06/16
What is answer to 17 increase by 6% decrease by 6%?
G Kennedy — 10/06/16
By the way I got 20 -120 and 180 too
Daniel_7788 — 10/06/16
€18.02 and 5.7percent decrease
sorecauvanesa — 10/06/16
I got 7. something I can't remember
sorecauvanesa — 10/06/16
I meant 5
SryanBruen — 10/06/16
I got two answers for C actually... 180 and 0 - I got 0 by picking two coordinates and then filling into the slope formula and then filling into the equation of the line formula (y = mx + c). That was one of the few questions I was unsure with.
G Kennedy — 10/06/16
Thanks got 5.7 too
rocky123 — 10/06/16
Sryan bruen you shouldn't have use the y=mx+c formula because this is for the equation of a linear line not a quadratic
SryanBruen — 10/06/16
Ino I just realised LOL
SryanBruen — 10/06/16
https://www.examinations.ie/tmp/1465579580_6922755.pdf
SryanBruen — 10/06/16
Oh wait... how is it a Linear line? Sorry.... the x is squared? How is it Linear? Plus it's a U shape?
SryanBruen — 10/06/16
Oh wait I read your thing wrong - Man I feel so dumb right now. Very sorry...
rocky123 — 10/06/16
Its fine
rocky123 — 10/06/16
This is a fully worked solution to this part of the question
EH458 — 10/06/16
Thank god someone else got the same as me ������������
Gerardgalv — 11/06/16
does someone want to tell me how the y=mx+c works ? isnt this a quadratic as it is a U shape but then it only has one root ? thanks whoever
Gerardgalv — 11/06/16
For Question 3 can someone tell me which side the 4 and the 8 went on ?
AubernGene — 11/06/16
I got c=180 b=120 and a= -20 would mixing uo the signs lose a lot of marks??