CBSE > Class 10 > Mathematics | CBSE Board | Homework Help

By elimination method
x + y =5         ……….(1)
2x –3y = 4      ………(2)
Multiplying equation (1) by 2, we obtain
2x + 2y = 10 ………..(3)
2x –3y = 4      ………(2)
Subtracting equation (2) from equation (3), we obtain
5y = 6
y = 6/5
Substituting the value in equation (1), we obtain
x = 5 - (6/5)   = 19/5
So our answer is x = 19/5 and y = 6/5

By substitution method
x + y =5 ……….(1)
subtract y both side we get
x = 5 - y ……..,(4)
plug the value of x in equation second we get
2(5 – y ) – 3y = 4
-5y = - 6
y = -6/-5 = 6/5
Plug the value of y in equation 4 we get
x = 5 – 6/5
x = 19/5

1Thank You

ANSWER

All questions of roots of ch 4

Posted by Sakshi Aggarwal 6 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Sia ? 6 years, 4 months ago

Check NCERT Solutions here : https://mycbseguide.com/ncert-solutions.html

1Thank You

Sakshi Aggarwal 6 years, 4 months ago

Thank u ??

0Thank You

ANSWER

If alpha and beta are the zeros of the polynomial 2 x square - 3 x + 7 and then evaluate the value of Alpha square + beta square and Alpha Cube + beta cube

Posted by Arun Gupta 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Pk . 6 years, 4 months ago

-94/6

1Thank You

ANSWER

Kisi sankhya or uske 2/3 ka anter 10 hai. Vo sankhya bataye

Posted by Virendra Kumar 6 years, 4 months ago

CBSE > Class 10 > Mathematics

3 answers

Pk . 6 years, 4 months ago

Let the no be x 2/3of x=2x/3 A/Q x-2x/3=10 i.e (3x-2x)/3=10 i.e x=10×3 i.e x=30

0Thank You

Gaurav Shukla 6 years, 4 months ago

How?

0Thank You

Pk . 6 years, 4 months ago

1Thank You

ANSWER

Prove that 2√3/5 is irrational ?

Posted by Rohit Kumar 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Abodh Shah 6 years, 4 months ago

Yes

2Thank You

ANSWER

576x square + 6336x + 17250

Posted by Lakshya Kumar 6 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

How to make project for any chapter in maths on paper ?

Posted by Aayush Gaur 6 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

I want a book as maths guide in 10th with many questions and thier solutions. So that when i can't solve i could get a easy help.... Suggest me except rd sharma. Kyuki uske dekh kar lagti hai... Reply me soon all my friends

Posted by Anjali Mishra 6 years, 4 months ago

CBSE > Class 10 > Mathematics

8 answers

Anshul Bhadouriya 6 years, 4 months ago

All in one of mathematics

0Thank You

Sudhanshu Raj 6 years, 4 months ago

X2+4x+k=0 is ateal

0Thank You

Sanchit Pahurkar 6 years, 4 months ago

R S Agrawal MBD Refresher Arihant All In One Oswaal Question Bank Golden MTG foundation and finally best book is NCERT.....

1Thank You

Chandan Singh 6 years, 4 months ago

Aditya singh

0Thank You

Ã.P.W.B.Đ ⚡ 6 years, 4 months ago

A textbook of mathematics By Monica Capoor

0Thank You

?Niharika Sharma ? 6 years, 4 months ago

Xamidea ?

1Thank You

Priyadarshini Priya 6 years, 4 months ago

Except rd Sharna oswall and NCERT exemplar may help for you

0Thank You

Aayush Gaur 6 years, 4 months ago

RS Agarwaal

1Thank You

ANSWER

x/a+y/b=2 ax-by=a^2-b^2

Posted by Sakshi Pagaria 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Jeyalakshmi Ganapathy 6 years, 4 months ago

x=a;y=b

0Thank You

ANSWER

How to find modal class in statistics

Posted by Vaishali Wani 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Rash Tea 6 years, 4 months ago

Highest frequency is modal class

2Thank You

ANSWER

What is upstream and downstream

Posted by Ayushi Chaudhary 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

?Niharika Sharma ? 6 years, 4 months ago

Upstream means opposite direction of stream and Downstream means along with stream.?

4Thank You

ANSWER

If 1+4+7+10+______+a=287 find the value of a

Posted by Puru Sharma 6 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Abhishek Jaiswal 6 years, 4 months ago

275

0Thank You

Shubham Draveriya 6 years, 4 months ago

Value of a is 274

1Thank You

ANSWER

Is there any internal choice in 6number sums??????

Posted by Baljit Kaur 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Nm ???? 6 years, 4 months ago

Nooo

0Thank You

ANSWER

How to solve subtitution method in liniear equation in to variable

Posted by Damce R Boys 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Nekong Dhiman 6 years, 4 months ago

In substitution method . initially you saw that there are two equation in the form of x and y or any other variable , firstly you should take one equation and find the vlue of one variable for example---- suppose first equation will be ( x+y = 4) and another one is (y+ 2x= 5) now take equation which is (x+y= 4 ) == ( x= 4-y ) and put this in another equation which is ( y+2x= 5) Then solve the value for x and y .

1Thank You

ANSWER

Find the zeroes of quadratic equations :25x2+25x+4

Posted by Football _Champ07 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Krishna Sharma 6 years, 4 months ago

Your first term is wrong

0Thank You

ANSWER

Ex-14.1 Qno.3 plz explain how can we cancel 18

Posted by Seema Naseem 6 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Simran Rathore 6 years, 4 months ago

From the given data mean is(a) 18 therefore (x)=a+sigma. Fidi/sigmafi =18=18+2f-40/44+f 2f-40/44+f=0 2f-40=0 2f=40 F=20 Hence missing frequency is 20?

0Thank You

Football _Champ07 6 years, 4 months ago

Ncert or ......????

0Thank You

ANSWER

Is exam idea question bank and RD Sharma better for maths exam. choose one best book and tell me about that for class 10th

Posted by Anjali Mishra 6 years, 4 months ago

CBSE > Class 10 > Mathematics

9 answers

Simran Rathore 6 years, 4 months ago

100 %success is nice?

0Thank You

Sarah ? 6 years, 4 months ago

Prefer only rd sharma along with ncert

1Thank You

Rahul Kumar 6 years, 4 months ago

Don't use rd sharma because it consists of extra question which we don't need to study.

1Thank You

?Niharika Sharma ? 6 years, 4 months ago

Ur welcm?

1Thank You

Football _Champ07 6 years, 4 months ago

Rd sharma or ncert

1Thank You

Anjali Mishra 6 years, 4 months ago

Thx

1Thank You

?Niharika Sharma ? 6 years, 4 months ago

RD Sharma ?

1Thank You

Ádítî Chàûdhäry 6 years, 4 months ago

RS Agarwal

1Thank You

Aman Singh 6 years, 4 months ago

R.s agarwal

1Thank You

ANSWER

Which side book should i perfer for maths class 10th

Posted by Anjali Mishra 6 years, 4 months ago

CBSE > Class 10 > Mathematics

8 answers

Divyansh Chauhan 6 years, 4 months ago

NCERT and its exempler

0Thank You

Anjali Mishra 6 years, 4 months ago

Glad to have your help aishreet.. Thx all for suggestions

0Thank You

Raj Singh 6 years, 4 months ago

No RS Agrawal is a bad book and RD Sharma is a quite good but NCERT is the best book and it's exampler

1Thank You

Sarah ? 6 years, 4 months ago

According to me you must follow RD Sharma if u want to get hundred out of hundred in maths ....as I have given board exam this year that is in the session 2018-19 and you know70% of questions came from RD Sharma this year and 28% of from NCERT in maths board exam.. only their statement was changed and you know what I got 99 in maths..i m very happy...??..

1Thank You

Nm ???? 6 years, 4 months ago

Ncert book or ncert exampler from this book the paper alwsys come

1Thank You

Ádítî Chàûdhäry 6 years, 4 months ago

RS Agarwal is better than RD Sharma

1Thank You

Bheesetti Chanakya 6 years, 4 months ago

Rd sharma is useful or not for class 10

0Thank You

Ádítî Chàûdhäry 6 years, 4 months ago

RS Aggarwal is the best book

1Thank You

ANSWER

Find the sum of first 10 multiples of 3

Posted by Kl Mohan 6 years, 4 months ago

CBSE > Class 10 > Mathematics

4 answers

Fab 6 years, 4 months ago

Sorry the formula is Sn=n÷2(2a+(n-1)×d)

0Thank You

Football _Champ07 6 years, 4 months ago

165....

0Thank You

Fab 6 years, 4 months ago

The no.of terms is 10 so, n=10 The first term is 3 so, a=3 The the multiples of 3 means the common difference is also 3 so,d=3 Then substitute the value of (a,n,d)in the formula. Sn=n÷2(2n+(n-1)+d)

1Thank You

Aman Singh 6 years, 4 months ago

165

1Thank You

ANSWER

Write the discriminant of the quadratic equation (x+5) whole square = 2(5x-3)

Posted by Kl Mohan 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Anjali Mishra 6 years, 4 months ago

Discriminant =-125

0Thank You

ANSWER

25x(x+1)=-4 find quadratic equations by polynomial

Posted by Harsh Modhiya 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Pk . 6 years, 4 months ago

-1/5and-4/5

0Thank You

ANSWER

Find the first term, common difference and next term of each Q. 9, 15, 21, 27.......

Posted by Sakshi Rajput 6 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Football _Champ07 6 years, 4 months ago

A=9 d=6 & a(n)=5 5th=9+(5-1)6=9+24=333

1Thank You

Sonali Patle 6 years, 4 months ago

First term=a=9 Common difference =d =15-9=6 5th term=a+(n-1)d =9+(5-1)6 =9+24 =33

2Thank You

ANSWER

Find the largest four_ digit number which divided by 4 ,7 and 13 leaves a remainder of 3 in each case

Posted by Naveen Kumar Prajapati 6 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Naveen Kumar Prajapati 6 years, 4 months ago

Thanks

0Thank You

Ravi Kumar 6 years, 4 months ago

Find lcm and subtract it

0Thank You

ANSWER

If tan alpha =5/12 find the value of sec alpha

Posted by Kl Mohan 6 years, 3 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 3 months ago

According to the question, tan {tex}\alpha{/tex} = {tex}\frac{5}{12}{/tex}
We know that, sec {tex}\alpha{/tex} = {tex}\sqrt{1 + tan^2 \alpha}{/tex}
= {tex}\sqrt{1 + \frac{25}{144}}{/tex}
={tex}\sqrt{ \frac{144+25}{144}}{/tex}
={tex}\sqrt{ \frac{169}{144}}{/tex}
= {tex}\frac{13}{12}{/tex}