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

Answer÷ 5x + 2y = 10 Let's take value of x=0 Substitute the value of x 5×0 + 2y = 10 2y = 10 y = 5. & x = 0 Again, x = 2 Substitute the value of x Therefore, 5×2 + 2y = 10 10 + 2y = 10 On further calculations. y = 0. & x = 2 Also, x = 4. Substitute the value of x. 5×4 + 2y = 10 20 + 2y = 10 On further calculations. 2y = -10 y = -5 & x = 4 Thank you🌹

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Ajay lives in Delhi. The city of Ajay 's father - in - law residence

Posted by Pratyush Yadav 2 years, 2 months ago

CBSE > Class 09 > Mathematics

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Dolly Singh 2 years, 2 months ago

Delhi

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Ravi was born on 29th February, 1964. The number of birthdays he has celebrated upto the year 2011 is……..

Posted by . Agrawal 2 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Kanika Sharma 2 years, 2 months ago

2011-1964 = 47yrs Leap year comes in every 4th year So 47/4=11yrs +3yrs

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Kanika Sharma 2 years, 2 months ago

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Factorise 3 x square - 19 X + 30 using splitting the middle term

Posted by N Tejaswini 2 years, 2 months ago

CBSE > Class 09 > Mathematics

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Himanshu Tiwari 2 years, 2 months ago

(3x-10)(x-3)

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Ayush Gujjar 2 years, 2 months ago

3x² -19x + 30 =0 3x²-10x-9x+30=0 X[3x-10]+3[3x-10]=0 Factor are: 1.(3x-10)=0 X=10/3 2.(x+3)=0 X=-3

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What is y coordinate

Posted by Smruthi Ps 2 years, 2 months ago

CBSE > Class 09 > Mathematics

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Preeti Dabral 2 years, 2 months ago

y-Coordinate. A y-coordinate is the second element in an ordered pair. When an ordered pair is graphed as the coordinates of a point in the coordinate plane, the y-coordinate represents the directed distance of the point from the x-axis. Another name for the y-coordinate is the ordinate.

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64-⅓ (64⅓-64⅔)

Posted by Rohit Mittal 2 years, 2 months ago

CBSE > Class 09 > Mathematics

3 answers

Vaibhav Verma 2 years, 2 months ago

-3

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Kanika Sharma 2 years, 2 months ago

-3

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Ayush Gujjar 2 years, 2 months ago

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For the set A and B , prove that. (A ∪ B) - (A/B) ∪ (B/A) ∪ ( A ∩ B )

Posted by Labhesh Phull 2 years, 2 months ago

CBSE > Class 09 > Mathematics

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Find the capacity in litres of conical vessel with height 12 cm slant heights 13

Posted by Mon Ish 2 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Loveyush Sagar 2 years, 2 months ago

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59+87

Posted by Likhit Reddy 2 years, 2 months ago

CBSE > Class 09 > Mathematics

3 answers

Chinmayi P P 2 years, 2 months ago

59+86=146

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S.Shahana S.Shahana 2 years, 2 months ago

146

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Khushi Tayal 2 years, 2 months ago

146

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If the diagonal of quadrilateral ABCD are equal ,find the measure of angle A.

Posted by Shagun Shagun 2 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Mostak Hussain 2 years, 2 months ago

90 degree

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Shagun Shagun 2 years, 2 months ago

90 degree

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A right angled triangle with sides 3cm and 4cm is revolved around its hypotenuse. Find the volume of the double cone generated

Posted by Nandani Gupta 2 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Preeti Dabral 2 years, 2 months ago

AB = 3 cm, AC = 4 cm
In $\triangle$ BAC, by pythagoras theorem
BC² = AB² + AC²
$\Rightarrow$ BC² = 3² + 4²
$\Rightarrow$ BC² = 25
$\Rightarrow$ BC = $\sqrt {25}$ = 5 cm
In $\triangle$ AOB and $\triangle$ CAB
$\angle$ ABO = $\angle$ ABC [common]
$\angle$ AOB = $\angle$ BAC [each 90^o]
Then, $\triangle$ AOB - $\triangle$ CAB [by AA similarity]
$\therefore$ $\frac { A O } { C A } = \frac { O B } { A B } = \frac { A B } { C B }$ [c.p.s.t]
$\Rightarrow$ $\frac { A O } { 4 } = \frac { O B } { 3 } = \frac { 3 } { 5 }$
Then, AO = $\frac{{4 \times 3}}{5}$ and OB = $\frac{{3 \times 3}}{5}$
$\Rightarrow$ AO = $\frac{12}{5}$ cm and OB = $\frac{9}{5}$ cm
$\therefore$ OC = 5 - $\frac{9}{5}$ = $\frac{16}{5}$ cm
$\therefore$ Volume of double cone thus generated = volume of first cone + volume of second cone
$= \frac { 1 } { 3 } \pi ( A O ) ^ { 2 } \times B O + \frac { 1 } { 3 } \pi ( A O ) ^ { 2 } \times O C$
$= \frac { 1 } { 3 } \times \frac { 22 } { 7 } \times \left( \frac { 12 } { 5 } \right) ^ { 2 } \times \frac { 9 } { 5 } + \frac { 1 } { 3 } \times \frac { 22 } { 7 } \times \left( \frac { 12 } { 5 } \right) ^ { 2 } \times \frac { 16 } { 5 }$
$= \frac { 1 } { 3 } \times \frac { 22 } { 7 } \times \frac { 12 } { 5 } \times \frac { 12 } { 5 } \left[ \frac { 9 } { 5 } + \frac { 16 } { 5 } \right]$
$= \frac { 1 } { 3 } \times \frac { 22 } { 7 } \times \frac { 12 } { 5 } \times \frac { 12 } { 5 } \times 5$
= $\frac{1056}{35}$ = $30 \frac { 6 } { 35 } \mathrm { cm } ^ { 3 }$ .

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ABCD is a cyclic quadrilateral whose diagonals intersect at a point E. If <DBC =70°,<bac= 30°, find <BCD. Further if AB=BC, find <BCD

Posted by Anu Rekaa 2 years, 2 months ago

CBSE > Class 09 > Mathematics

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3+3/3= ?

Posted by Hematpal Pal 2 years, 2 months ago

CBSE > Class 09 > Mathematics

5 answers

Radhika Waghmare 2 years, 2 months ago

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Joy Deep 7 A 2 years, 2 months ago

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Kanak Sharma 2 years, 2 months ago

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Kanak Sharma 2 years, 2 months ago

😑😑😑

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Yunus Ali Guddu Foot Wear, Jalgaon 2 years, 2 months ago

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Q.24 Prove that angles opposite to equal sides of a triangle are equal

Posted by Hematpal Pal 2 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Preeti Dabral 2 years, 2 months ago

ABC is a given triangle with, AB=AC.

To prove: Angle opposite to AB= Angle
opposite to AC (i.e) ∠C=∠B

Construction: Draw AD perpendicular to BC
∴∠ADB=∠ADC=90^o

Proof:
Consider △ABD and △ACD

AD is common

AB=AC

∴∠ADB=∠ADC=90^o

Hence ∠ABD=∠ACD
∠ABC=∠ACB
∠B=∠C. Hence the proof
This is known as Isosceles triangle theorem

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X-X3 IS IT CUBIC OR LINEAR POLYNOMIAL

Posted by Leevanshi Leevanshi 2 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Jay Srivastav 2 years, 2 months ago

Cubic polynomial

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A capsule of medicine is in the shape of a sphere of diameter 3.5 mm. How much medicine (in mm√3) is needed to fill this capsule?

Posted by Arya Pathak 2 years, 2 months ago

CBSE > Class 09 > Mathematics

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If a point C lies between two points A and B such that AC=BC, then prove that AC=1/2 AB Then in answer why we should add AC on both sides..!?

Posted by Turupu Mahender 2 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Rani Sahu 2 years, 2 months ago

Given: AB is line. C is point lies on AB. AC=BC. Prove: AC=1/2 AB Proof: Hence, AB = AC+ BC. (AC = BC) AB= AC +AC AB = 2AC AC=1/2 AB {Its because we have to prove that AC =1/2 AB, and for this we require to add AC .

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Find the coordinates of the points where the lines 2x-y=3 meets both the axis

Posted by Aravinth Sivabalan.K 2 years, 2 months ago

CBSE > Class 09 > Mathematics

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Sakshi Yadav 2 years, 2 months ago

Y=3-2x

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ABC PROOVE THE PYTHAGORAS THEOREM

Posted by Harsh Rathore 2 years, 2 months ago

CBSE > Class 09 > Mathematics

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Continue this process until you have 14 right triangles

Posted by Soni Yadav 2 years, 2 months ago

CBSE > Class 09 > Mathematics

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The perimeter of an isosceles triangle is 32m and the ratio of the two equal sides is 3:2 find its area

Posted by Rajeswari Sahu Rosy 2 years, 2 months ago

CBSE > Class 09 > Mathematics

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What is triangle 🔺️

Posted by Faiz Malik 2 years, 2 months ago

CBSE > Class 09 > Mathematics

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Prineb Nehra 2 years, 2 months ago

Triangle is bounded by three sides

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Aravinth Sivabalan.K 2 years, 2 months ago

A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry. A triangle with vertices A, B, and C is denoted \triangle ABC. In Euclidean geometry, any three points, when non-collinear, determine a unique triangle and simultaneously, a unique plane.

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Aakriti Gupta 2 years, 2 months ago

Triangle are 3 side

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A plastic box 1.5m long, 1.25m wide and 65 cm deep is to be made. It is opened at the top. Ignoring the thickness of the plastic sheet, determine: (i)The area of the sheet required for making tje box. (ii)The cost of sheet for it, if a sheet measuring 1m costs € 20

Posted by Kashish Singh 2 years, 3 months ago

CBSE > Class 09 > Mathematics