Mathematics: Post your doubts here!

[Danish Sardar]

Need help in "b" . I think the question has a mistake or i am doing it wrong check it what do u think i am getting 589.065. DONT MIND THAT SCRIBBLES

 

[Mr.Physics]

Need help in "b" . I think the question has a mistake or i am doing it wrong check it what do u think i am getting 589.065. DONT MIND THAT SCRIBBLES

No man !!
Actually you misunderstood the question.

R= 4.5 % per year
T=3 years
P= 681 - I <----- This is the tricky part here. The question says that he withdrew this amount after the interest was paid.

I = PRT/100
100I = (681 - I) x 4.5 x 3
100I = 13.5 x (681 - I)
100I = 9193.5 - 13.5I
113.5I = 9193.5
I = 9193.5/113.5 = $81

The questions asks for the amount he invested which is P
So P = 681 - I = 681 - 81 = $600

 

[Danish Sardar]

No man !!
Actually you misunderstood the question.

R= 4.5 % per year
T=3 years
P= 681 - I <----- This is the tricky part here. The question says that he withdrew this amount after the interest was paid.

I = PRT/100
100I = (681 - I) x 4.5 x 3
100I = 13.5 x (681 - I)
100I = 9193.5 - 13.5I
113.5I = 9193.5
I = 9193.5/113.5 = $81

The questions asks for the amount he invested which is P
So P = 681 - I = 681 - 81 = $600

I understand other thingsbut how u got that 13.5I by multiplying it with (681-I) Mr.Physics

 

[Mr.Physics]

I understand other thingsbut how u got that 13.5I by multiplying it with (681-I) Mr.Physics

Kis ki yaadoun main gum ho bhai ??
Aankhain kholo
4.5 x 3 = 13.5
13.5 x (681 - I)
Donu ko 13.5 se multiply krain gai
9193.5 - 13.5 I

 

[Danish Sardar]

Kis ki yaadoun main gum ho bhai ??
Aankhain kholo
4.5 x 3 = 13.5
13.5 x (681 - I)
Donu ko 13.5 se multiply krain gai
9193.5 - 13.5 I

Sorry yaar agar disturb howe toh mein kuch or hi soch raaha tha ♤ Mr.Physics

 

[Mr.Physics]

Sorry yaar agar disturb howe toh mein kuch or hi soch raaha tha ♤ Mr.Physics

Nah koi masla nhi bhai

 

[Danish Sardar]

I tried but i got the answer and i dont know if its correct plz ch3ck it 3a

 

[Danish Sardar]

Can we simplify it more? Idk becaus3 i saw a video and he did it till the 2 nd line so plz help

 

[Mr.Physics]

Can we simplify it more? Idk becaus3 i saw a video and he did it till the 2 nd line so plz helpView attachment 58141View attachment 58141

Nah
you did it wrong bro

 

[Danish Sardar]

Nah
you did it wrong bro

Sso hoe to do it

 

[ahmed faraz]

Can we simplify it more? Idk becaus3 i saw a video and he did it till the 2 nd line so plz helpView attachment 58141View attachment 58141

I think the second line, is the most simplified form..

 

[Danish Sardar]

I think the second line, is the most simplified form..

Thnx i was also thinking that!

 

[Danish Sardar]

The question is at the top and we have to make y the subject i tried but ma brain is not ready to anyone can help Mr.Physics

 

[fleurisabelle]

There is a topic in my book, covering Cartesian equations, equation of a circle and parametric equations of a circle. It's not in the syllabus, is it? Just wanted to confirm, cuz I can't see it anywhere in the syllabus and I thought I might skip it

 

[Anum96]

There is a topic in my book, covering Cartesian equations, equation of a circle and parametric equations of a circle. It's not in the syllabus, is it? Just wanted to confirm, cuz I can't see it anywhere in the syllabus and I thought I might skip it

I believe youre asking for Alevel topics? This is the IGCSE thread
Cartesian equations are included in vectors. You should just do whatever is in the syllabus, few changes might have been there for 2016 so yeah.

 

[Mr.Physics]

There is a topic in my book, covering Cartesian equations, equation of a circle and parametric equations of a circle. It's not in the syllabus, is it? Just wanted to confirm, cuz I can't see it anywhere in the syllabus and I thought I might skip it

It ain't in IGCSE syllabus. It's for A level. Yeah you SHOULD skip it

 

[Mr.Physics]

View attachment 58617 The question is at the top and we have to make y the subject i tried but ma brain is not ready to anyone can help Mr.Physics

Danish Sardar

 

[Anum96]

It ain't in IGCSE syllabus. It's for A level. Yeah you SHOULD skip it

She's in Alevels!

 

[Mr.Physics]

She's in Alevels!

Oh sorry
I never knew

 

[fleurisabelle]

I believe youre asking for Alevel topics? This is the IGCSE thread
Cartesian equations are included in vectors. You should just do whatever is in the syllabus, few changes might have been there for 2016 so yeah.

She's in Alevels!

It ain't in IGCSE syllabus. It's for A level. Yeah you SHOULD skip it

My apologies for posting in the wrong thread! and yeah..I'm in A'Level sooo I'v to do it? was so excited to skip you know that excitement when you can't understand something and you check the syllabus with the hope that it isn't included