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

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27x cube + y cube + z cube - 9xyz

Posted by Ilaf Khan 2 years, 3 months ago

CBSE > Class 09 > Mathematics

0 answers

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<aoc and <boc form a linear pair. Determine the value of x

Posted by Afsana Begum 2 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Kunwar V.P Singh 2 years, 3 months ago

Where is your question???

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Find the ratio of the total surface area of a sphere and a hemisphere of same radius

Posted by Sharvani Pardhi 2 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Tejasv Sahu 2 years, 3 months ago

4:3

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25bags of wheat each weight 40 Kg cost rs 2750 what is the cost of 35 bags of wheat if each bags weight 50 Kg?

Posted by Renuka Narang 2 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Divyansh Gupta 2 years, 3 months ago

I think solution is 4812.5 Am i right

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If we are given side if equilateral triangle and have to find the area so which is more convenient method- 1) area of equilateral triangle 2) area of 🔺 by heron formula.

Posted by Sonakshi Suryavanshi 2 years, 3 months ago

CBSE > Class 09 > Mathematics

5 answers

Ayush Kumar 2 years, 3 months ago

I think are of equilateral triangle is more easy than herons formula

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Rahul ._. 2 years, 3 months ago

Because area of equilateral triangle is √3/4a² so it is difficult

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Rahul ._. 2 years, 3 months ago

I think we can use heron formula

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Rahul ._. 2 years, 3 months ago

Itne tough humko nhi aate

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Rahul ._. 2 years, 3 months ago

Sorry

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Please i cant understand quadrilateral

Posted by Anshika Soni 2 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Rahul ._. 2 years, 3 months ago

Simple first clear your concept from PW vedios then clear you congruency rule then try to attempt questions

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Q21 Simplify 8 sqrt(36) - sqrt(625) - 7sqrt(16) + sqrt(81) SECTIO

Posted by Bhavy Aroraa 2 years, 3 months ago

CBSE > Class 09 > Mathematics

3 answers

Harsh Raj 2 years, 3 months ago

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Smriti Gupta 2 years, 3 months ago

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Daksh Shinde 2 years, 3 months ago

What is mean by surface

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a=6-root 35 find a^2+1/a^2

Posted by Raksha Chettri 2 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Preeti Dabral 2 years, 3 months ago

Here, a = 6 - √35

$\begin{aligned} & \Rightarrow 1 / a=1 /(6-\sqrt{35}) \\ & \Rightarrow 1 / a=(6+\sqrt{35}) /[(6+\sqrt{35})(6-\sqrt{35})] \end{aligned}$

[By multiplying (6 + √35) in both numerator & denominator]

$\begin{aligned} & \Rightarrow 1 / a=(6+\sqrt{35}) /\left(6^2-(\sqrt{35})^2\right) \\ & \Rightarrow 1 / a=(6+\sqrt{35})(36-35) \\ & \Rightarrow 1 / a=(6+\sqrt{35}) / 1 \\ & \Rightarrow 1 / a=6+\sqrt{35} \end{aligned}$

Now we have to find value of a² + 1/a²

$\begin{aligned} & \Rightarrow a^2+1 / a^2=(a)^2+(1 / a)^2 \\ & \Rightarrow(6-\sqrt{ } 35)^2+(6+\sqrt{ } 35)^2 \\ & \Rightarrow\left(6^2-2 \times 6 \sqrt{35}+35\right)+\left(6^2+2 \times 6 \sqrt{35}+35\right) \\ & \Rightarrow 36-12 \sqrt{ } 35+35+36+12 \sqrt{ } 35+35 \\ & \Rightarrow 72+70 \\ & \Rightarrow 142 \end{aligned}$

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Q What is measure of an angle whose measure is 32° less than it's supplement

Posted by Fatima Zafar 2 years, 3 months ago

CBSE > Class 09 > Mathematics

3 answers

Preeti Dabral 2 years, 3 months ago

74°

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Manthan Ganvir 2 years, 3 months ago

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Smriti Gupta 2 years, 3 months ago

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0.7777777......... write a p/q in the form . Hint non - terminating and non - recurring. Number

Posted by Debayan Kar 2 years, 3 months ago

CBSE > Class 09 > Mathematics

4 answers

Yashas V 2 years, 3 months ago

7/9

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Rahul ._. 2 years, 3 months ago

7/9

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Smriti Gupta 2 years, 3 months ago

7/9

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Debayan Kar 2 years, 3 months ago

7/9

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√0.4

Posted by Vansh Sing 2 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Debayan Kar 2 years, 3 months ago

0.2 or 2/10, 1/4 are rational number

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Vansh Sing 2 years, 3 months ago

O.2

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If a equal to 4-root 15 find all 11 parts

Posted by Bhavya Bansal 2 years, 3 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

If x=2+√2 then Find (x+1/x)^2

Posted by Aditya D 2 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Smriti Gupta 2 years, 3 months ago

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Find the cost of fencing a rectangular field whose length and breadth are 22 m and 16m respectively at Rs. 20.50 per metre .

Posted by Varun Kajal 2 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Aditya D 2 years, 3 months ago

Length=22m Breadth=16m Area of rectangle= l×b =22×16=352m2 Cost of fencing=₹20.50 Cost = 352×20.50=₹7216 Ans

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(3+√3) (3-√3)

Posted by Pushti Jain 2 years, 3 months ago

CBSE > Class 09 > Mathematics

2 answers

Smriti Gupta 2 years, 3 months ago

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Su Ka 2 years, 3 months ago

(3+√3)(3-√3)=(3)²-(√3)²=9-3=6

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(1³+2³+3³)½

Posted by Pooja Arya 2 years, 3 months ago

CBSE > Class 09 > Mathematics

3 answers

Preeti Dabral 2 years, 3 months ago

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Smriti Gupta 2 years, 3 months ago

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Cheran Teja 2 years, 3 months ago

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(1/7π)³ expand

Posted by Debayan Kar 2 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Dolly Verma 2 years, 3 months ago

Don't post personal information, mobile numbers and other details.
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In fig., Ab||CD angle APQ= 50°, angle PRD=127° then the value of x and y respectively

Posted by Pushkar Gajbhiye 2 years, 3 months ago

CBSE > Class 09 > Mathematics

1 answers

Preeti Dabral 2 years, 3 months ago

We are given that $AB\parallel CD,\angle APQ = {50^\circ }$ and $\angle$ PRD = 127°
We need to find the value of x and y in the figure.
$\angle$ APQ = x = 50° (Alternate interior angles)
$\angle$ PRD = $\angle$ APR = 127° (Alternate interior angles)
$\angle$ APR = $\angle$ QPR + $\angle$ APQ.
127° = y + 50°
$\Rightarrow$ y = 77°.
Therefore, we can conclude that x = 55° and y = 77°
Alternatively, 127° = y + x (because exterior angle is equal to the sum of interior opposite angles).
so, 127° = y + 50°
which gives, x = 50° and y = 77°

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(7π)³ expand

Posted by Debayan Kar 2 years, 4 months ago

CBSE > Class 09 > Mathematics

5 answers

Neeraj Kaushik 2 years, 3 months ago

Ans is 66

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Debayan Kar 2 years, 4 months ago

Answer is 10648

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Rudranshi Thakur 2 years, 4 months ago

(7×22/7)^3

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Debayan Kar 2 years, 4 months ago

Akshadeep chup re

1Thank You

Akshadeep Meshram 2 years, 3 months 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.

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