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

Ask questions which are clear, concise and easy to understand.

Ask Question

A water tank is getting filled up by water flowing at the rate of 15 cm3/sec. If the volume of the water filled in y secs is x cm3, write a linear equation in two variales to represent this situation. Draw graph for equation form and find volume of water filled in 9 secs. Please answer fast!!

Posted by Digvijay Singh Puhan 5 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Jagjeet Kaur 5 years, 3 months ago

X = 15u 1sec= 15 cm³ Therefore in 9 sec = 15 X 9 = 135cm³

0Thank You

Pradeep Mehta 5 years, 3 months ago

X = 15u 1sec= 15 cm³ Therefore in 9 sec = 15 X 9 = 135cm³

0Thank You

ANSWER

Write four solution for each Equation. (I) 2x + y = 7. (ii) πX. + y = 9. (iii) x = 4y

Posted by Neha Pilare 5 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Rohit Meena 5 years, 3 months ago

(1),2x+y =7 2x+y=7 2×0+y=7 0+y=?

1Thank You

Yogita Ingle 5 years, 3 months ago

(a)2x + y = 7......(1)

On putting x=0 in equation 1

2x+y=7

2×0+y=7

0+y=7

y=7

So( 0, 7) is a solution of given equation.

let y=0

2x+y=7

2x+0=7

2x=7

X= 7/2

So(7/2,0) is a solution of given equation.

let x = 1

2x+y=7

2×1+y=7

2+y=7

Y= 7-2

Y=5

(1,5) is the solution.

let x = 2

2x+y=7

2×2+y=7

4+y=7

Y= 7-4

Y= 3

The solution is (2,3)

Hence, 4 out of the infinitely many solutions of the given equation are(0,7), (7/2,0),(1,5),(2,3)

(b) πx + y = 9

let x = 0

πx + y = 9

π×0+y =9

0+y= 9

Y=9

(0,9) is the solution.

Let y = 0

πx + y = 9

πx+0=9

πx=9

x= 9/π

(9/π,0) is the solution.

Let x = 1

πx + y = 9

π×1+y=9

π+y=9

Y= 9-π

(1,9-π) is the solution.

Let x = -1

πx + y = 9

π×-1+y=9

-π+y=9

Y= 9+π

(-1,9+π) is the solution.

Hence, 4 out of the infinitely many solutions of the given equation are(0,9), (9/π,0),(1,9-π),(-1,9+π)

Let x = 0

X=4y

0=4y

Y=0/4=0

Y=0

(0,0) is the solution.

Let x= 1

X=4y

1=4y

Y= 1/4

(1,1/4) is the solution.

Let y = 1

X=4y

X=4×1

X=4

(4,1) is the solution.

Let x = 2

X=4y

2=4y

Y=2/4

Y=1/2

(2,1/2) is the solution.

Hence, 4 out of the infinitely many solutions of the given equation are(0,0), (1,1/4),(4,1),(2,1/2)

0Thank You

ANSWER

Expressing linear equations in the form of ax+by+c=0

Posted by Migo Bagra 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Silviya Shrivastav 5 years, 3 months ago

Express the following linear equations in the form ax + by + c = 0 and indicate the value of a, b and c in each case : i) 2x+3y=9.35ˉ ANSWER i) 2x+3y=9.35ˉ⟹2x+3y−9.35ˉ where a=2,b=3 and c=−9.35ˉ

0Thank You

ANSWER

How many metre of cloth 4cm wide will be require for make conical tent the radius whose base is 600 cm hieght is 8m use pie is 3.14

Posted by Suhani Soni 5 years, 3 months ago

CBSE > Class 09 > Mathematics

3 answers

Suhani Soni 5 years, 3 months ago

0Thank You

Ish Anand 5 years, 3 months ago

The formula of curved surface area of a conical tent is pie X radius (r) X slant height (l) (l) square = (r) square + (h) square r = 600 cm = 6m h = 8m l = ✓36 + 64 l = ✓100 l = 10 Curved surface area = 3.14 x 6 x 10 = 188.4 Now we have to find the length of the cloth whose breadth is 4 cm = 0.4m L x B = Area of cloth which is 188.4 m2 L=x 0.4x = 188.4m2 x = 471m

0Thank You

Abhishek Kumar 5 years, 3 months ago

Nhi pta

1Thank You

ANSWER

(a+b)square

Posted by Harleen Kaur 5 years, 3 months ago

CBSE > Class 09 > Mathematics

4 answers

Prithvi Singh 5 years, 3 months ago

a²+b²+2ab

0Thank You

Shaurya Dixit 5 years, 3 months ago

a^2+b^2+2ab

0Thank You

Srivalli Battina 5 years, 3 months ago

a^2 +b^2+2ab

1Thank You

Tejesh Sahu 5 years, 3 months ago

a²+b²+2ab

0Thank You

ANSWER

If x+√15=4 then x+(1/x) =

Posted by Likhith Manohar Vadapalli 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Vanshu Koli 5 years, 3 months ago

The electricity bills ( in rupees) of 40 houses in a locality are given below. Construct a grouped frequency distribution table: 78, 87, 81, 52, 59, 65, 101, 108, 115, 95, 98, 65, 62, 121, 128, 63, 76, 84, 89, 91, 65, 101, 95, 81, 87, 105, 129, 92, 75, 105, 78, 72, 107, 116, 127, 100, 80, 82, 61, 118

1Thank You

ANSWER

(99)

Posted by Shree Mina 5 years, 3 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

100000+38542

Posted by Sushil Kumar Chahar 5 years, 3 months ago

CBSE > Class 09 > Mathematics

3 answers

Akash Patil 5 years, 3 months ago

Maths teacher

0Thank You

Srivalli Battina 5 years, 3 months ago

138542

1Thank You

Ranjit Kumar Sahoo 5 years, 3 months ago

138542

1Thank You

ANSWER

(12+19) ka hall square ?

Posted by Aman Mishra 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Krishnam Sarda 5 years, 3 months ago

961

0Thank You

ANSWER

(102)²

Posted by Vaishnavi Gharge 5 years, 3 months ago

CBSE > Class 09 > Mathematics

4 answers

1874 Vishanth R 5 years, 3 months ago

10404

0Thank You

Mahira Srivastava 5 years, 3 months ago

(100 + 2 )² =(100)² + (2)² + 2 (100) (2) =10000 + 4 + 400 =10000 + 404 =10404 Hope it helps !

1Thank You

Aman Mishra 5 years, 3 months ago

10404

0Thank You

Khwairakpam Zenith Chanu 5 years, 3 months ago

(102)² =10404

1Thank You

ANSWER

give any examples of polynomials,and why is it polynomial.

Posted by Rohan Patil 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Pradeep Mehta 5 years, 3 months ago

P(x) -X³+2x²-7x+6 is an example of polynomial because the power of x variable are 3 , 2 , 1 and 0 which are positive and not in fraction. Similarly √2 x +3x⁴ is also polynomial beacaues power of variable X are 1 and 4 which are positive and not in fraction.

1Thank You

ANSWER

Factorise: P^6-512q^8

Posted by Tarun Murugan 5 years, 3 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Find the value of a polynomial 3xcube -4xsqare+7x-5 at x =3 and also when x=-3

Posted by Laya R 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Krishnam Sarda 5 years, 3 months ago

x=3, 3×x^3 - 4×x^2 + 7×x - 5 3×3^3 - 4×3^2 + 7×3 - 5 81 - 36 + 21 - 5 102 - 41 61. x= -3, 3×(-3)^3 - 4×(-3)^2 +7×(-3) - 5 3×(-27) - 4×9 + (-21) - 5 -81 - 36 - 21 - 5 -143

1Thank You

ANSWER

find the value of t,if x=2 and y=3 is a solution of the equation 3x+2y=t. plz give me answer.

Posted by Rohan Patil 5 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Divya Gupta 5 years, 3 months ago

T=12

1Thank You

Yogita Ingle 5 years, 3 months ago

Put x=2 and y=3
3x+2y=t
t = 3(2) + 2 (3)
t = 6 + 6
t = 12

2Thank You

ANSWER

for what value of k,x=1,y=0,is a solution of[k+2/k-1]x -[3k-2/k+2]y-3=0. plz give me answer.

Posted by Rohan Patil 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 3 months ago

Put x=1,y=0
[k+2/k-1]x -[3k-2/k+2]y-3=0

(k²+ 2 - k)/k] 1 -[3k-2/k+2]0-3=0
(k²+ 2 - k)/k] = 3

k²+ 2 - k = 3k

k²+ 2 - k -3k = 0

k² -4k+ 2= 0

1Thank You

ANSWER

simplify (3+7)(3-7)

Posted by Chaitali Patil 5 years, 3 months ago

CBSE > Class 09 > Mathematics

5 answers

Aarushi Erande 5 years, 3 months ago

3²-7² = 21-49 = -28

1Thank You

Pallavi Joshi 5 years, 3 months ago

3²-7²

1Thank You

Rohan Patil 5 years, 3 months ago

the answer is==[3+7=(10)]×[3-7=(4). 10×4=40.

1Thank You

Rohan Patil 5 years, 3 months ago

97 is not answer by mistake I have done.

0Thank You

Rohan Patil 5 years, 3 months ago

1Thank You

ANSWER

If the mean of five observations x, x+2, x+4, x+6, x+8 is 11, then the mean of first three observations will be-

Posted by Bhumi Agarwal 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Krishnam Sarda 5 years, 3 months ago

0Thank You

ANSWER

for the line 2x+3y=6, the value of x-intercept and y-intercept respectively are- *

Posted by Bhumi Agarwal 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Aarushi Erande 5 years, 3 months ago

Supposing x=0 then, 2×0+3y=6 0+3y=6 y=6/3 y=2 So, (0,2) are the x and y coordinates. You may take any other value for x and y.

0Thank You

ANSWER

What is area of india

Posted by Hitesh Rav 5 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Silviya Shrivastav 5 years, 3 months ago

3.287 million km²

0Thank You

Hitesh Rav 5 years, 3 months ago

The area of inda is 3.287 million KM

0Thank You

ANSWER

Draw the graph of the equations y+x=5

Posted by Rohan Patil 5 years, 3 months ago

CBSE > Class 09 > Mathematics

5 answers

Ash Greninja 5 years, 3 months ago

Hope it's helpful for you ???.

1Thank You

Ash Greninja 5 years, 3 months ago

Please be care full while writing the solution it is posted in the form of paragraph so please understand where u have to change the line. If any problem just ask me ?

1Thank You

Ash Greninja 5 years, 3 months ago

In the below in the last third line the x y 0 4 5 0 is the table in it u have to write 0 and below 0 u have write 5 in the x column and in y column u have to write 4 and below 4 u have to write 0.

2Thank You

Ash Greninja 5 years, 3 months ago

Solution: To draw a graph of linear equations in two variables, let us find out the points to plot. To find out the points, we have to find the values which x and y can have, satisfying the equation. Here, y + x = 5 Substituting the values for x, When x = 0, y + x = 5 = y + 0 = 5 = y = 5 When x = 5, y + x = 5 = y + 5 = 5 = y = 5 – 5 = y = 0 x y 0 4 5 0 ∴, The points to be plotted are (0, 4) and (5,0). (Note-Draw the graph by using the coordinates.)

1Thank You

Rohan Patil 5 years, 3 months ago

plz give me answet

2Thank You

ANSWER

2=x1+x2/2

Posted by Anu Anu 5 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Ţ Bìşwął 5 years, 3 months ago

2=1x+2x/2 2=1x/1+2x/2 Take the L.C.M of 1 and 2 =2 2=1x/1+2x/2 2=2x+2x/2 2=4x/2 2=2x 2/2=x 1=x orx=1

0Thank You

Silviya Shrivastav 5 years, 3 months ago

2=1x+2x/2 2=1x/1+2x/2 Take LCM:2 2=2x/2+2x/2 2=4x/2 2*2=4x 4=4x 4/4=x 1=x HOPE IT HELPS

0Thank You

ANSWER

125+645221=

Posted by Sudip Kumar Garai 5 years, 3 months ago

CBSE > Class 09 > Mathematics

3 answers

Divya Gupta 5 years, 3 months ago

645,346

1Thank You

Sakshi Singh 5 years, 3 months ago

645,346

3Thank You

Akshay Garg 5 years, 3 months ago

645,346

3Thank You

ANSWER

Check whether 7 + 3 X is a factor of 3x3 + 7 x

Posted by Prashant Sharma 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Abhinav Ninghot 5 years, 3 months ago

7 + 3x : x= -7/3 Evaluting value in 3x³ + 7x 3× (-7/3)³ + 7 × (-7/3)= -343/9 + (-49/3)= -354 - 147 / 9 - 501 /9 Therefore, 7+3x is not a factor of 3x³ + 7x.

0Thank You

ANSWER

Represent root 9. 3 on the number line

Posted by Prashant Sharma 5 years, 3 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Let x and y be rational and irrational numbers respectively is x+ y necessarily is support of your answer ch 1 ka exemplary questions

Posted by Sakshi Singh 5 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Sakshi Singh 5 years, 3 months ago

Answer Kya hoga connfusion Hai mujhe

0Thank You

Suhani H Chavda 5 years, 3 months ago

OK fine

0Thank You

ANSWER

If x=9-4√5 , find the value of x+1/x

Posted by Digvijay Singh Puhan 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Sakshi Singh 5 years, 3 months ago

x=9-4√5 Since (a+b) (a-b) =a^2-b^2 (9-4√5= 1/(9+4√5 which is x Therefore we can write 1/x=9+4√5 =>x+1/x=(9-4√5) +(9+4√5) 9+9=18

2Thank You

ANSWER

Maths mcqs type questions

Posted by Gudiya Kumari 5 years, 3 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

First them me kon kon se chapter aayega mathematics me?

Posted by Aman Mishra 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Suhani H Chavda 5 years, 3 months ago

I think chapter 1 to 5

0Thank You

ANSWER

What is rombass ?

Posted by Aman Mishra 5 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Mahira Srivastava 5 years, 3 months ago

Its Rhombus

0Thank You

Sakshi Singh 5 years, 3 months ago

A a plane aquarium geometry a a rhombus is a quadrilateral whose four side all have the same length another name se is equilateral . Quadrilateral since equilateral means that all of its side are equal in length

0Thank You

ANSWER

What is quadrilateral ?

Posted by Aman Mishra 5 years, 3 months ago

CBSE > Class 09 > Mathematics