Mathematics: Post your doubts here!

[streeter]

how to do may june 2012 variant 42 question 3c part 2

 

[Anonimous12345]

Hello. Does anyone has some file/explanation about bearings?
Tks

 

[AlphaWolf]

Anonimo. For help in Locus/Loci you should watch this video. It is a life-saver.

 

[AlphaWolf]

In q1(B), why do we multiply the multiplier and not divide, which we normally do. I really don't understand this.
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w10_qp_42.pdf

 

[Rania1]

Is there a mistake in the mark scheme of october november 2012 43 question b) i) ? Please answer ASAP

 

[ZaqZainab]

how do we use the calculator to draw the tangent?

 

[notnek01]

Is there a mistake in the mark scheme of october november 2012 43 question b) i) ? Please answer ASAP

Which question number?

 

[notnek01]

how do we use the calculator to draw the tangent?

You can't use a calculator to draw a tangent.

 

[Ahmed Al Hilali]

please replay to my questions in page 163

 

[Rania1]

Which question number?

Question 1

 

[notnek01]

Question 1

The mark scheme answer seems fine to me. Why do you think it's wrong?

 

[Rania1]

The mark scheme answer seems fine to me. Why do you think it's wrong?

I keep getting 196.41 , this is what i did : 160 x 225 + 330 x 190 + 150 x 180 and divided everything by 640. What did i do wrong?

 

[notnek01]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w09_qp_4.pdf

This is one of the hardest paper i solved , and i have a lot of Q ,, please help me ..

Q 2 a iv , why the factor is -1 but not 1 ?

Q3 C

Q6 D

Q7 C ii

Q8 C iii

Q10 C , f , g

Solve the one you know , plz help

Tip: Next time, post your questions individually. People don't want to respond to so many questions in one go.

Q2aiv. I've explained this here: https://www.xtremepapers.com/commun...st-your-doubts-here.2565/page-148#post-508948.
Scroll down until you see the imges.

Q3c. Either card 1 is chosen on the 1st try or it is chosen on the 2nd try.

P(Card 1 chosen on 1st try) = 2/6

If it happens on the 2nd try, it can't have happened on the first try.

So P(Card 1 chosen not chosen on 1st try but chosen on 2nd try) = 4/6 * 2/5 = 8/30

Add the probabilities together: 2/6 + 8/30 = 18/30


I'll answer your other questions if I have time later.

 

[notnek01]

I keep getting 196.41 , this is what i did : 160 x 225 + 330 x 190 + 150 x 180 and divided everything by 640. What did i do wrong?

Are you sure you mean 1bi in Winter 2012-43 ?

 

[shazmina]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s08_qp_4.pdf could u plz let me knw hw to solve the question no. 10 part ( (d) i e de question related to sequence......

 

[AlphaWolf]

anyone???

 

[shazmina]

anyone???

yep

 

[Ahmed Al Hilali]

Tip: Next time, post your questions individually. People don't want to respond to so many questions in one go.

Q2aiv. I've explained this here: https://www.xtremepapers.com/commun...st-your-doubts-here.2565/page-148#post-508948.
Scroll down until you see the imges.

Q3c. Either card 1 is chosen on the 1st try or it is chosen on the 2nd try.

P(Card 1 chosen on 1st try) = 2/6

If it happens on the 2nd try, it can't have happened on the first try.

So P(Card 1 chosen not chosen on 1st try but chosen on 2nd try) = 4/6 * 2/5 = 8/30

Add the probabilities together: 2/6 + 8/30 = 18/30


I'll answer your other questions if I have time later.

Thanks a lot ,
i didnt know if I have a lot of questions I shall post them individually , sorry

 

[AlphaWolf]

hope someone answers my question?

 

[ZaqZainab]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w09_qp_4.pdf

This is one of the hardest paper i solved , and i have a lot of Q ,, please help me ..

Q 2 a iv , why the factor is -1 but not 1 ?

Q3 C

Q6 D

Q7 C ii

Q8 C iii

Q10 C , f , g

Solve the one you know , plz help

For 6 d just draw a STRAIGHT line which is y-10 and the other stays the same