## O-Level Elementary Math

PSLE marks the graduation of Primary school students and their entry into Secondary schools as teenagers. Discuss all issues about Secondary schooling here.
KSP2013777
OrangeBelt
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### Re: O-Level Elementary Math

GreenBelt
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### Re: O-Level Elementary Math

KSP2013777 wrote:Thank you very much, Future Academy. Your working is very clear.

You are welcome!

This question is not very straight forward. It is considered as a challenging E Math question.

Please be reminded that step-by-step working is expected if you want to score full marks (including all method marks) for it.

Cheers!

questionable_i
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### Re: O-Level Elementary Math

Can anyone help me with this question Q1)(c)(ii), I need it urgently. Thank you in advance.
http://oi67.tinypic.com/j8fq5y.jpg

GreenBelt
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### Re: O-Level Elementary Math

questionable_i wrote:Can anyone help me with this question Q1)(c)(ii), I need it urgently. Thank you in advance.
http://oi67.tinypic.com/j8fq5y.jpg

Please let us know if you need further explanation, our team of ex IP school/RGS/NYGH teachers are here to support.

questionable_i
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### Re: O-Level Elementary Math

Can anyone help me to convert 12m/s^2 to m/s with working. Thank you

GreenBelt
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### Re: O-Level Elementary Math

questionable_i wrote:Can anyone help me to convert 12m/s^2 to m/s with working. Thank you

Hi,

12 m/s^2 and m/s have different units. Cannot do conversion directly.

Cheers

boinbi
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### Re: O-Level Elementary Math

boinbi
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### Re: O-Level Elementary Math

The answer is x+y=1. But I don't know how to get the answer.

Jeffrey Goh
KiasuNewbie
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### Re: O-Level Elementary Math

boinbi wrote:The answer is x+y=1. But I don't know how to get the answer.

Since the equation has EVEN power index, therefore, it is always positive.

In order to have the sum of (x+4)^50 + (y-5)^100 = 0,
Therefore,
(x+4)^50 = 0 and (y-5)^100 = 0
Hence,
x = -4 and y = 5

Therefore x + y = 1.

Done by Jeffrey Goh on 21st Oct 2016. Hp: 9636-4921

Cheers.

boinbi
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