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Junior Cert Mathematics — 10/06/16 27

just wondering how everyone found it (higher)? the start was incredibly easy! any idea on the last part of the last q, about tide times in crookhaven? i got 180 for what c was, but any idea of the value of a and b? also what did ye say for the one about proving every answer to the equation was a multiple of 4??

conor72 — 10/06/16
A = 20 B = -120
glitteryhippie — 10/06/16
how did you get that, if you don't mind me asking? a lot of other people said that, but i have no idea how! i thought it was a simultaneous equation, but an unsure
carolinaaplasencia — 10/06/16
OMG yeah for the start I was ust like this shit is easy but I didn't gt q14 q8 q9 q12 any1 with me . WHAT WAS UP WITH THAT SEQUENCE SECTION . And do u think not doing those 4 questions will really affect my grade?????????????????
SryanBruen — 10/06/16
Though the questions are uneven marks. According to 4/14 x 100, I got that you would lose approximately 29% if you didn't do them AT LEAST.
carolinaaplasencia — 10/06/16
ahhhhhhh Thank u at least 50% is secured
David10 — 10/06/16
What was the answer to 3.14 x 10 to the power of 100?
Suitcasey114 — 10/06/16
I got 101,as multiplying by 10^2 was still 3 digits,and 100-2=98+3 was 101
geniuse — 10/06/16
101
David10 — 10/06/16
Shit,thanks anyway
K1234 — 10/06/16
What answer did you get for higher level question 5 part (ii)
David10 — 10/06/16
2.5 metres per second
sophie544 — 10/06/16
I said 100 for that question as they I assumed they moved it 100 decimal places, would I still get marks?
David10 — 10/06/16
No,you needed speed =distance over time=100 over 40=2.5 metres per second
sophie544 — 10/06/16
I'm talking about the 3.14 question
SryanBruen — 10/06/16
Where did you get 100 (and 40?) from? I did 350 divided 80?
David10 — 10/06/16
From the start of line B to the end of point B is a distance of 100 metres, and the time it took was 40 seconds
David10 — 10/06/16
sophie444 I got 105 but I think mines wrong
SryanBruen — 10/06/16
OH...... stupid me hahaha
SryanBruen — 10/06/16
Yeah I did get that... I don't think where I got 350 and 80 from LOL. Probably because now that Maths is over, I'm losing me marbles.
student331 — 10/06/16
Did anyone get a=10 and b=-90 for q14? Its a symmetrical graph so at at 3 hours, it should be at zero. 10(a)^2-90(a)+180 10(3)^2-90(3)+180 10(9)-270+180 90-270+180 -180+180=0 Can someone correct where I went wrong please?
Buller — 10/06/16
Did anyone get a w shape in question 10
student331 — 10/06/16
Yeah, I did
geniuse — 10/06/16
Same
SryanBruen — 10/06/16
Yeah I did Buller
David10 — 10/06/16
Does anyone know when the marking scheme will go up?
student331 — 10/06/16
I'm not sure when they will be up but not any time soon because they may have to change the marking scheme for some questions.
David10 — 10/06/16
Oh okay thanks