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

Probability is simply how likely something is to happen. Whenever we're unsure about the outcome of an event, we can talk about the probabilities of certain outcomes—how likely they are.

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A hemispherical tank emptied by a pipe at the rate of 5 liter per minute how long will it take to empty the tank if the diameter is 1.5 m

Posted by Shreyansh Mishra 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Pradeep Singh 5 years, 3 months ago

3.3

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If one of the angles of a triangle is 130°, then the angle between the bisectors of the other two angles can

Posted by Mishika Pandey 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Ananya K 5 years, 3 months ago

Consider a △ABC,such that ∠BAC=130 ∘ and bisectors of ∠B and ∠C meet at O. To find: ∠BOC Now, in △ABC, ∠BAC+∠ABC+∠ACB=180 130+∠ABC+∠ACB=180 (Angle sum property) ∠ABC+∠ACB=50 2 1 (∠ABC+∠ACB)=25 ∠OBC+∠OCB=25 (OB and OC bisect ∠ABC and ∠ACB) Now, in △OBC, ∠OBC+∠OCB+∠BOC=180 25+∠BOC=180 ∠BOC=155 ∘ .

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If x+y=5 and xy=4 find x-y

Posted by Shreyansh Mishra 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 3 months ago

(x+y)² = x²- 2xy + y²

= x²+ 2xy + y²- 4xy

= (x+y)²- 4xy

= 5² - 4 × 4

= 25 - 16 = 9

∴ x - y = √9

= 3

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Write coefficients of x2 in each of the following . 1.x2 + 4.

Posted by Geeta Arora 5 years, 3 months ago

CBSE > Class 09 > Mathematics

3 answers

Tanishq Chouhan 5 years, 3 months ago

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Naina Gupta 5 years, 3 months ago

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Abha Mahant 5 years, 3 months ago

The correct answer is 1

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Factorize : 25x² -10x+1-36y²

Posted by Trishla Jain 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Student 10Th 5 years, 3 months ago

25x^2 - 10x +1 can be written as (5x-1)2 al 80% 5.0 Now By identity a^2 -b^2 = (a-b)(a+b) (5x - 6y -1( 5x +6y-1)

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The simplest form of a^m/a^m

Posted by Mallikarjunappa Mallikarjunappa 5 years, 3 months ago

CBSE > Class 09 > Mathematics

3 answers

Tanishq Chouhan 5 years, 3 months ago

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Abha Mahant 5 years, 3 months ago

The answer is 1

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Trishla Jain 5 years, 3 months ago

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Any solution of the linear equation 2x + 0y = 9 in two variables

Posted by Shivansh Verma 5 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Shivansh Verma 5 years, 3 months ago

Wrong ans

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Anubhav Singh 5 years, 3 months ago

x=9/2, 18/4, 27/6... y = any number which you want

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The sum of angle of a triangle is 180 degree

Posted by Suaib Khan 5 years, 3 months ago

CBSE > Class 09 > Mathematics

5 answers

Tanishq Chouhan 5 years, 3 months ago

Yes

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Hardick Choudhary 5 years, 3 months ago

Yes

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Akash Jha 5 years, 3 months ago

Yes it is true

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Shivansh Verma 5 years, 3 months ago

Yes

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Ananya K 5 years, 3 months ago

Yes the sum of the triangle is 180°

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1 xhapter

Posted by Vaishali Singh 5 years, 3 months ago

CBSE > Class 09 > Mathematics

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A river 3m deep and 40 m wide is flowing at the ratio of 2km per hour.How much water will fall into in a minute

Posted by Crazy Girl 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 3 months ago

Given, a river 3 m deep and 40 m wide is flowing at the rate of 2 km per hour.

Area of cross section of the river =3 × 40=120m²

Now, volume of water flowing through this cross section in every minute = Area * rate

= 120 × 2 km/hr

= 120 ×(2000/60) m/min

= 2 × 2000

= 4000m³

Since1m³=1000 litres

So, 4000m³=4000 × 1000 litres =4000000 litres

So, in 1 minute, water will fall into the sea is 4000000 litres.

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In which quadrant will the point allies if ordinate is 2 and abcissa is -3

Posted by Tohib Mohd 5 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Anushka Agarwal 5 years, 3 months ago

2nd Quadrant. Since, abscissa means the "x-axis" and ordinate means "y-axis".

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Garv Dubey 5 years, 3 months ago

It will lie on 4th quadrant

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The LSA of cube is 100 m^2 . What is the volume of the cube

Posted by Nishita Goel 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 3 months ago

Given, lateral surface area of a cube = 100 m²
We know that, lateral surface area of a cube = 4 x (Side)²
⇒ 100 = 4 x (Side)²
⇒ (Side)² = 100/4 = 25
⇒ Side = √25 = 5 m
[taking positive square root because side is always a positive quantity]
Now, volume of a cube = (Side)³ = (5)³= 5 x 5 x 5 = 125 m³
Hence, the volume of the cube is 125 m³.

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18. One of the factors of (25x^?- 1) + (1 + 5x)^?is:-

Posted by Ankit Samanta 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Rupesh Nehra 5 years, 3 months ago

Answer is 25x^2

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in the figure ?? ∥ ??, ∠ ? ? ? = 1400 ,∠ ? ? ? = 300 , ???? ∠ ? ? ?.

Posted by Alan Alackal Alan 5 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Abhishek Chaudhary 5 years, 3 months ago

Mera Bhai question pura send kiya karo

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Shabd Kumar 5 years, 3 months ago

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Write four solutions of the equation 3.14x+y=9

Posted by Arun Singh 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 3 months ago

14x + y = 9

1) if x =1

14(1) + y = 9

y = 9 - 14
y = -5

2) If x = 0

14(0) + y = 9

y = 9
3) if x = -1

14(-1) + y = 9

y = 9 + 14
y = 15

4) If x = 2

14(1) + y = 9
14(2) + y = 9
y = 9 - 28
y = -19

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What is line system

Posted by Nidhi Nidhi 5 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Ankit Samanta 5 years, 3 months ago

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Nidhi Nidhi 5 years, 3 months ago

line segment is bounded by two distinct points on aline

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Are the square roots of all positive integers irrational? If not, give an example of the square root of a number that is a rational number

Posted by Ananya K 5 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Naina Gupta 5 years, 3 months ago

√6,√8..

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Garv Dubey 5 years, 3 months ago

The square root of 4 , 25 , 16 are rational numbera

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(1upon 2 -1/3+12z)²

Posted by Deepanshi Antil 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Tiger$ Praful Jawale 5 years, 3 months ago

3/5+36z^2

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Prove that the sum of triangle is 180 degree

Posted by Omanshu Gupta 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Ananya K 5 years, 3 months ago

Given : A triangle ABC. To prove : ∠A+∠B+∠C=180 o ⟹∠1+∠2+∠3=180 o Construction : Through A, draw a line l parallel to BC. Proof : Since l∥BC. Therefore, ∠2=∠4 .......eq(i) And, ∠3=∠5......eq(ii) adding eq(i)and(ii) Therefore, ∠2+∠3=∠4+∠5 ∠1+∠2+∠3=∠1+∠4+∠5 [adding∠1bothSide] ∠1+∠2+∠3=180 o Thus, the sum of three angles of a triangle is 180 o . solution

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Find the value of polynomial 1/3 p - 1/4 = 6 then what will, the value of 1/3 p + 1/4

Posted by Omanshu Gupta 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Anubhav Singh 5 years, 3 months ago

26/4

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Define pie

Posted by Shivani Mani 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Ananya K 5 years, 3 months ago

A pie chart (or a circle chart) is a circular statistical graphic, which is divided into slices to illustrate numerical proportion. In a pie chart, the arc length of each slice (and consequently its central angle and area), is proportional to the quantity it represents.

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Prove that -2,-11 are equidistant from -3,-7 and 4,6

Posted by Rosie Lama 5 years, 3 months ago

CBSE > Class 09 > Mathematics

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AD is an altitude of an isosceles triangle ABC in which AB = AC show that AD bisects BC

Posted by Khushi Bhadouria 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Ananya K 5 years, 3 months ago

∆ABC is an isosceles triangle, So, AB = AC Also, AD is the altitude

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A gardener has to put double fence all around a triangular path with sides 120m, 80m and 60m. In the middle of each sides, there is a gate of width 10m. Find the length of the wire needed for the fence.

Posted by Shabd Kumar 5 years, 3 months ago

CBSE > Class 09 > Mathematics

3 answers

Shabd Kumar 5 years, 3 months ago

Thanks Yogita, but I think that double fence means on the both sides of path. As the gate is only on one side so we have to minus length of three gates from total fence only one time and the answer is 490m

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Amrita Pandey 5 years, 3 months ago

Dog

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Yogita Ingle 5 years, 3 months ago

A gardener has to put a double fence all around a triangular path with sides 120m, 80m and 60m.

In the middle of each side there is a gate of width 10m.

The perimeter of triangle = Sum of all sides

= 120+80+60 = 260 m

Now , the length of wire needed for fence = 2 x ( Perimeter of triangle - 3(10))

= 2 x(260-30) = 2 x (230) = 460 m

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25^6 - 25^6 =

Posted by Omanshu Gupta 5 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Ananya K 5 years, 3 months ago

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Mahankali Karthikeya 5 years, 3 months ago

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Prove that (i) √5 - √3 is an irrational number. (ii) √5 + √3 is an irrational number. Solve this ! Need help !

Posted by Nikhil Bbagchandani 5 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Bhavadhaarini M 5 years, 3 months ago

Let as assume on contrary that √3 + √5 is a rational number. Then there exists co - prime integers p and q such that ⇒ √3 is a rational number . But this contradicts the fact that √3 is irrational. So, our assumption is wrong. Hence, √3 + √5 is irrational.

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If two parallel lines are cut by a transversal prove that the bisectors of interior angle on the same side of transversal intersects each other at right angles angles

Posted by Ankit Mondal 5 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Vinayak Singh 5 years, 3 months ago

1 rush11 01.03.2018 Math Secondary School +5 pts Answered if two parallel lines are intersected by a transversal prove that the bisectors of the interior angles on the same side of the transversal intersect each other at right angles 2 SEE ANSWERS Log in to add comment Answer 4.5/5 17 ayush8696 Helping Hand 16 answers 1.1K people helped I hope that this will help you thankyou tramwayniceix and 24 more users found this answer helpful THANKS 17 4.5 (8 votes) Log in to add comment Answer 3.0/5 1 Brainly User Solutions: We know that the sum of interior angles on the same side of the transversal is 180°. Hence, ∠BMN + ∠DNM = 180° => 1/2∠BMN + 1/2∠DNM = 90° => ∠PMN + ∠PNM = 90° => ∠1 + ∠2 = 90° ............. (i) In △PMN, we have ∠1 + ∠2 + ∠3 = 180° ......... (ii) From (i) and (ii), we have 90° + ∠3 = 180° => ∠3 = 90° => PM and PN intersect at right angles.

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Vinayak Singh 5 years, 3 months ago

here you go and if u want more solutions just dm me

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