CBSE > Class 09 > Mathematics | CBSE Board | Homework Help

3x+2y=11 3x=11-2y x=11-2y/3.......(1) 4x-5y=7........(2) Now, Putting (1) in (2) 4(11-2y/3) - 5y = 7 44 - 8y - 5y = 7 -13y = 7-44 -13y = -37 y = 37/13 or 2.84 Now, you can find x by your own. Very easy question.

0Thank You

ANSWER

Prove that root 5 is irrational

Posted by Pari Srivastava 2 years ago

CBSE > Class 09 > Mathematics

3 answers

Ankita Rawat 2 years ago

√5=√2+√1 since √2 is a irr no so automatically √5 will be an irr no

0Thank You

Om Paikaray Om Paikaray 2 years ago

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

Pari Srivastava 2 years ago

Proof that root 5 is irrational

0Thank You

ANSWER

a^(2)−b^(2)−a−b

Posted by K Khushi 2 years ago

CBSE > Class 09 > Mathematics

2 answers

Himanshu Maurya 2 years ago

What to do in this question

3Thank You

Himanshu Maurya 2 years ago

What to do in this question

2Thank You

ANSWER

The vulgar fraction 2.91 bar is given by

Posted by Harman Singh 2 years ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Solve 576√6×1/2

Posted by Ujjwal Mangla 2 years ago

CBSE > Class 09 > Mathematics

3 answers

Ankita Rawat 2 years ago

Ans is 288√6 hope it helps you

0Thank You

Goddu Pranavika 2 years ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

Sushil Seth Sushil Seth 2 years ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

2Thank You

ANSWER

Exercise 12.1

Posted by Sharshti Singh 2 years ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

The formula of to find the surface area of cuboid of leanth and breadth (b) and height (h)

Posted by Faizan Faizan 2 years ago

CBSE > Class 09 > Mathematics

3 answers

Prateek Bedi 2 years ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

Om Paikaray Om Paikaray 2 years ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

Dudekula Haseena D.Haseena 2 years ago

2payr square

0Thank You

ANSWER

Assertion (A): The perimeter of a right angled triangle is 60 cm and its hypotenuse is 26 cm. The other sides of the triangle are 10 cm and 24 cm. Also, area of the triangle is 120 cm². Reason (R): (Base)² + (Perpendicular)² = (Hypotenuse)²

Posted by Anu 🍂🍄🌿 2 years, 1 month ago

CBSE > Class 09 > Mathematics

2 answers

Ankita Rawat 2 years ago

A option both is true and r is correct explanation of a

0Thank You

Sairaj Rout 2 years, 1 month ago

Both A and R are correct

2Thank You

ANSWER

Shape of parallelogram

Posted by Haricharan Haricharan 2 years, 1 month ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Rationalise 3+√2 / 5-√3

Posted by Dhiya Kapadiya 2 years, 1 month ago

CBSE > Class 09 > Mathematics

3 answers

Km Solanke 2 years, 1 month ago

3+√2/5-√3 = (3+√2)(5+√3) / (5-√3)(5+√3) = 15+3√3+5√2+√6 / 25-3 = 15+3√3+5√2+√6 / 22

1Thank You

Veer Singh Bisht 2 years, 1 month ago

Bhai ismein rationalise the denominator ka format lage ga

1Thank You

Anu 🍂🍄🌿 2 years, 1 month ago

3+√2/5-√3 = (3+√2)(5+√3) / (5-√3)(5+√3) = 15+3√3+5√2+√6 / 25-3 = 15+3√3+5√2+√6 / 22

2Thank You

ANSWER

In fig 6.17. poq is a line. Ray or is perpendicular to line pq. OS is another ray lying between rats op and or. Prove that angle Ros is 1/2 angle QoS - angle pos

Posted by Aanchal Lakhonde 2 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Arisha Ustad 2 years, 1 month ago

QOS=QOR+ROS. equation 1 POR=POS+ROS. equation 1 Add equation 1 and 2

0Thank You

ANSWER

Factorise , 84-2x-2x²

Posted by Gourav Suryawanshi 2 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Veer Singh Bisht 2 years, 1 month ago

-2x²-2x+84 (arrange) -2(x²+x-42) -2(x²+7x-6x-42) -2{x(x+7)-6(x+7)} -2{(x+7)(x-6)} [answer]

2Thank You

ANSWER

In figure, ABCD and AEFG are both parallelogram if

Posted by Ayan Hussain 2 years, 1 month ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

If 3-√5/3+2√5=a√5-19b/11 then the value of b is

Posted by Swati Samaniya 2 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Ankita Rawat 2 years ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

ANSWER

If z^2+ 1/z^2 = 18 then find the value of z^3- 1/z^3 using only the positive value of z - 1/z

Posted by Vinod Singh 2 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Ankita Rawat 2 years ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

ANSWER

Length 7m width 6.5m and height 4m each classroom has one door measuring 3m ×1.4 m and three Windows each measuring 2 m x 1m . The inner wall of classroom are to be painted the contractor charge rupees 15 per metre square for painting the walls of the classroom based on this information answer the following question diarrhoea of walls of a classroom to be painted is: a 100 m square B 98 m square c 97.8 m square d 14 m square

Posted by Preeti Sharma 2 years, 1 month ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Posted by Preeti Sharma 2 years, 1 month ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Posted by Preeti Sharma 2 years, 1 month ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Zero's of polynomial of 5x²-2x²+3x-2 is

Posted by Mokshika Dangi 2 years, 1 month ago

CBSE > Class 09 > Mathematics

2 answers

Ankita Rawat 2 years ago

Thts wrong -2 is not factor of x

0Thank You

Daksh Nagar 2 years, 1 month ago

(x+2) or x=-2 is the factor of p(x) = 5x²-2x²+3x-2

1Thank You

ANSWER

Q.19 On the graph paper, plot a point A(-2,-2). Reflect point A in x-axis and y-axis. Let these points be B and C respectively. Guess the measure of BAC.

Posted by Alka Rajput 2 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Alka Rajput 2 years, 1 month ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

ANSWER

DF and IG perpendicular BC angleBAC=120,AFG is equilateral triangle find angleFDA

Posted by Dev Raj 2 years, 1 month ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

If π is irrational then why is 22/7 rational? Π=22/7

Posted by Amrutha Gade 2 years, 1 month ago

CBSE > Class 09 > Mathematics

5 answers

Chandra Kala 2 years, 1 month ago

Because the value of π is approximate that is not exact value so 22/7 is rational but π is irrational

1Thank You

Nitin Jat 2 years, 1 month ago

Because 22/7 in the from of p/q and q is not equal to 0 and p and q are Integers

0Thank You

Sharad Mishra 2 years, 1 month ago

Because 22/7 in the from of p/q and q is not equal to 0 and p and q are Integers

0Thank You

Arya Mishra 2 years, 1 month ago

Because the value of π is not fixed so .

1Thank You

Ajay Kumar 2 years, 1 month ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

ANSWER

What length of tarpaulin 3 m wide be required to made a conical tent of height 8 m and base radius 6 m ? Assume that the extra length of material that will be required for stitching margins and wastage in citting is approximately 20 cm. (Use π=3.14)

Posted by Piyush Raghuvanshi 2 years, 1 month ago

CBSE > Class 09 > Mathematics

2 answers

Ankita Rawat 2 years ago

0Thank You

Ravneet Kaur 2 years, 1 month ago

Width of tarpaulin =3m Height of tarpaulin=8m Radius=6m l=(r²)+(h²) L=(6)²+(8)² =36+64 =100=10 length of tarpaulin =l1 L1×b1=3.14 L1=3.14×6×10/3 =6.28 6.28×10 =62.8 Margin =20 Total length =62.8+0.20 =63m This the answer

2Thank You

ANSWER

In adjoining figure AC = AE , AB =AD and ∆BAD = ∆EAC. show that BC = DE

Posted by Piyush Raghuvanshi 2 years, 1 month ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

in the figure given angle apc=100 and angle bpd=146, find angle cpd

Posted by Jaysinh Barad 2 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Vansh Sharma 2 years, 1 month ago

angle CPD = angle BPD - angle APC = 146 - 100 = 46°

0Thank You

ANSWER

The surface area and volume of cylinder are equal.find diameter of cylinder

Posted by Vikas Yadav Vikas Yadav 2 years, 1 month ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Identity-6 example -(3a+4b)³

Posted by Shuddhika Nighot 2 years, 1 month ago

CBSE > Class 09 > Mathematics

2 answers

Ankita Rawat 2 years ago

-27a^3+64b^3+108a^2b-144ab^2

0Thank You

Vranda Bishya 2 years, 1 month ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

ANSWER

Plot points A(2,0),B(2,2),C(0,2) and join OA,AB,BC and CO. what figure do you obtain?

Posted by Priyanshi Sirohi 2 years, 1 month ago

CBSE > Class 09 > Mathematics

2 answers

Ankita Rawat 2 years ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

Anshu Shina 2 years, 1 month ago

Grape draw

1Thank You

ANSWER