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ANSWER

Draw the graph of the linear equation in two variables, 5 x + 3y = 15

Posted by Likhith Manohar Vadapalli 5 years, 4 months ago

CBSE > Class 09 > Mathematics

2 answers

Prashant Rai 5 years, 4 months ago

Prashant Rai 5 years, 4 months ago

Take any two solution of the given equation. Let ,take x=3and y=0 Also,x=0and y=5 Now from the above values draw the graph.

ANSWER

If (6x+10) and (40-50) are two supplementary angles then value if x is

Posted by Sankalp Badgaiyan 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Shabd Kumar 5 years, 4 months ago

x= 10

ANSWER

How to solve 0.00032 in the form pq where p, q are integer and q=

Posted by Anchal Yadav 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 5 years, 4 months ago

Let 100x = 0.323232.............. (i)

10000x = 32.323232............... (ii)

(ii) - (i) = 32.323232.... - 0.323232...

10000x - 100x = 32

9900x = 32

x = 32/9900

Making 32/9900 in simplest form

HCF of 32,9900 = 4

divide them with 4

32/9900 = 8/2475

ANSWER

What is variable in maths and also define linear equations with eg.

Posted by Tanisha Dahiya 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 5 years, 4 months ago

Variable

In Maths, a variable is an alphabet or term that represents an unknown number. The variables are specially used in the case of algebraic expression or algebra. The variable is a quantity that can be changed or which is not fixed according to the mathematical operation performed. Usually, in algebra, we express an unknown number using the term ‘x’ and ‘y’. But this is not particular, and we can use any alphabet.

Linear Equations

An equation is said to be linear equation in two variables if it is written in the form of ax + by + c=0, where a, b & c are real numbers and the coefficients of x and y, i.e a and b respectively, are not equal to zero.

For example, 10x+4y = 3 and -x+5y = 2 are linear equations in two variables.

ANSWER

Sides of triangle are in the ratio 12:17:25and it's perimeter is 540cm find its are

Posted by Abhishek Singh 5 years, 4 months ago

CBSE > Class 09 > Mathematics

2 answers

Abhishek Singh 4 years, 11 months ago

Thankyou

Yogita Ingle 5 years, 4 months ago

Ratio of sides
12: 17:25

let them be
12x,17x, 25x respectively

perimeter of a triangle = sum of all sides

540 = 12x,17x, 25x
540 = 54x
x = 10

all sides measure
12x = 12×10 = 120
17x = 17× 10 = 170
25x= 25 × 10 = 250
it's semipetimeter = 540/2 = 270

using heron's formula area of the triangle =√ (s)(s-a)(s-b)(s-c)}
where s is the semipetimeter and a,b,c
area the sides of the triangle.

√ {( 270)(270-120)(270-170)(270-250)}

= 9000cm^2.

ANSWER

Please explain the mid-point theorem

Posted by Abhishek Singh 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 4 months ago

MidPoint Theorem Statement

The midpoint theorem states that “The line segment in a triangle joining the midpoint of two sides of the triangle is said to be parallel to its third side and is also half of the length of the third side.”

Construction- Extend the line segment DE and produce it to F such that, EF=DE.

In the triangle, ADE, and also the triangle CFE

EC= AE —– (given)

∠CEF = ∠AED {vertically opposite angles}

EF = DE { by construction}

hence,

△ CFE ≅ △ ADE {by SAS}

Therefore,

∠CFE = ∠ADE {by c.p.c.t.}

∠FCE= ∠DAE {by c.p.c.t.}

and CF = AD {by c.p.c.t.}

The angles, ∠CFE and ∠ADE are the alternate interior angles. Assume CF and AB as two lines which are intersected by the transversal DF.

In a similar way, ∠FCE and ∠DAE are alternate interior angles. Assume CF and AB are the two lines which are intersected by the transversal AC.

Therefore, CF ∥ AB

So, CF ∥ BD

and CF = BD {since BD = AD, it is proved that CF = AD}

Thus, BDFC forms a parallelogram.

By the use of properties of a parallelogram, we can write

BC ∥ DF

and BC = DF

BC ∥ DE

and DE = (1/2 * BC).

Hence, the midpoint theorem is Proved.

ANSWER

Q(2).What is the formula of volume of cone. [Think you]

Posted by Kumar Rohan 5 years, 4 months ago

CBSE > Class 09 > Mathematics

4 answers

Hetvi Patel 5 years, 3 months ago

1/3πr2h

Hency Jain 5 years, 3 months ago

1\3pie r 2 h

Riya Kumari 5 years, 4 months ago

1/3πr2h

Kanika Tanwar 5 years, 4 months ago

1/3πr²h

ANSWER

Q(1).Find the volume of a sphere whose diameter is (I). 14 [ Write the answer and send ] [Think you]

Posted by Kumar Rohan 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 5 years, 3 months ago

Diameter = 14 cm, radius = 14/2 = 7 cm

Given : Diameter is 14 cm.

To find : The volume of a sphere ?

Solution :

The volume of a sphere is

Diameter is 14 cm.

Radius is

Substitute the value,

Therefore, the volume of a sphere is 1427.33 cm³.

ANSWER

solve the following quadratic equation (2x+3)^2=25

Posted by K. Vignesh Krishnamurthy 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

N Ayana 5 years, 4 months ago

answer will be 4. see the process below (2x+3)^2=25 2x^2 + 3^2=25 4x+9=25 4x=25-9=16 4x=16 x=16/4=4

ANSWER

If one of the angle is 10 degree less than one third of its complement find the angles

Posted by Tanisha Jain 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 5 years, 4 months ago

Let the angle be x

Complementary angles : A pair of angles whose sum is 90° are called complementary angles.

Complement of x = 90-x

We are given that an angle is 10 degree more than one third of its complement .

So,

Complement = 90-x = 90-60 = 30°

Hence The greater angle is 60°

ANSWER

2. If the diagonals of a parallelogram are equal, show that it is a rectangle.

Posted by Mohit Solanki 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 4 months ago

□ ABCD is a parallelogram

consider Δ ACD and Δ ABD

AC = BD .... (given)

AB = DC .... (opposite sides of parallelogram)

AD = AD .... (common side)

∴Δ ACD ≅Δ ABD (sss test of congruence)

∠ BAD = ∠ CDA .... (cpct)

∠BAD+∠CDA=180∘. [Adjacent angles of parallelogram are supplementary]

so ∠ BAD and ∠ CDA are right angles as they are congruent and supplementary.

Therefor, □ ABCD is a rectangle since a

parallelogram with one right interior angle is a rectangle.

ANSWER

From a library in a week the no. of books issued are 40,45,50,55,60,65,70,75,80,85. Find the average number of books issued per day

Posted by Rahul Sharma 5 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

in triangle abc if angle b = 35° angle c = 65° and the bisector of angle bac meets inp arrange ap bp and cp descending order

Posted by Krupal Sonkusare 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 5 years, 3 months ago

It is given that

∠B = 35°

∠C = 65°

AP is the bisector of ∠CAB

We have to arrange AP, BPand CP in descending order.

In ΔACP we have

∠ACP = 65°

∠CAP = 40°(As AP is the bisector of ∠CAB

So AP > CP (Sides in front or greater angle will be greater) ........(1)

In ΔABP we have

∠BAP = 40°(As AP is the bisector of ∠CAB)

Since,

∠BAP >∠ABP

So BP > AP ..........(2)

Hence

From (1) & (2) we have

BP > AP > CP

ANSWER

Find six rational numbers between 1 and 2

Posted by Rishika Vijapure 5 years, 4 months ago

CBSE > Class 09 > Mathematics

2 answers

Aayushi Nagar 5 years, 4 months ago

To find six rational no in 1 and 2... Use the formula..A+B×(1/2) So, A=1 & b=2. =1+2×(1/2) =3×1/2 =3/2 .(Answer 1) Same repeat ..again Now,Consider ,A=3/2 & B=2 Then consider, A=3/2 & B=1 " , and so on.. Also there is an other easy method...we can use. For that...you should know that how many numbers we have to find?=6 So, given no are 1 and 2. So first write them in fraction form.. So, 1/1 & 2/1. Now , multiply these with (6+1=7) So, =1/1×7/7 = 7/7 .... & =2/1×7/7=14/7 Now,between 7/7 and 14/7 Rational number will be..... 8/7, 9/7, 10/7, 11/7, 12/7, 13/7.

Mishika Pandey 5 years, 4 months ago

11/10 , 12/10 13/10 14/10 15/10 16/10

ANSWER

Every natural number is a whole number. Why ?

Posted by Anshi Sheth 5 years, 4 months ago

CBSE > Class 09 > Mathematics

5 answers

Pluto Physicist 5 years, 4 months ago

Every natural no. is a whole no. But every whole no. Is not a natural no. Because whole no. Consists 0,1,2,3,.......infinite...... but natural no. Consists only 1,2,3,.......infinite.....

Kumar Rohan 5 years, 4 months ago

Every natural number is whole number because natural no. Start 1 to infinitive and whole no. Start 0 to infinitive so, every natural no. is a whole no.

Aayushi Nagar 5 years, 4 months ago

Every natural number is whole no...natural no starts from 1..to infinite.. Whole no are collection all natural no ...but also with zero.(0) that is whole no. start from 0..to infinite. So here,the statement is correct that every natural no is a whole no also..

Mohit Sadhwani 5 years, 4 months ago

1 possible

3Thank You

ᵗʰⁱˢ ᵍⁱʳˡ ⁱˢ ༒︎Dᴇᴀᴅ Iɴsɪᴅᴇ༒︎✔︎ 5 years, 4 months ago

The whole numbers are the numbers 0, 1, 2, 3, 4, and so on. Negative numbers are not considered "whole numbers." All natural numbers are whole numbers, but not all whole numbers are natural numbers since zero is a whole number but not a natural number.

4Thank You

ANSWER

Every rational number is a whole number . Why ?

Posted by Anshi Sheth 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

ᵗʰⁱˢ ᵍⁱʳˡ ⁱˢ ༒︎Dᴇᴀᴅ Iɴsɪᴅᴇ༒︎✔︎ 5 years, 4 months ago

A rational number is any number can be expressed as a fraction. Whereas, a whole number is a positive number without a decimal or fractions. ... So every rational number is may or may not be a whole number but every whole number is a rational number.

ANSWER

Every integer is a whole number . Why ?

Posted by Anshi Sheth 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

ᵗʰⁱˢ ᵍⁱʳˡ ⁱˢ ༒︎Dᴇᴀᴅ Iɴsɪᴅᴇ༒︎✔︎ 5 years, 4 months ago

Every integer is started from 0,and it can be both positive or negative. But whole numbers are started from 0 to positive numbers,, hence whole numbers can't be negative.So, It would be wrong to say that Every integer is a whole number. Therefore, Every integer is not a whole number..

ANSWER

Every integer is a rational number . Why ?

Posted by Anshi Sheth 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

ᵗʰⁱˢ ᵍⁱʳˡ ⁱˢ ༒︎Dᴇᴀᴅ Iɴsɪᴅᴇ༒︎✔︎ 5 years, 4 months ago

Yes, every integer is a rational number because rational number basically numbers that have presented in fraction and integer numbers are also be presented in form of fraction. Rational numbers are represent in form of fraction as a / b where a is known as numerator and b is known as denominator.

ANSWER

Every whole number is a natural number ( true or false , give answer with reason )

Posted by Anshi Sheth 5 years, 4 months ago

CBSE > Class 09 > Mathematics

4 answers

Kumar Rohan 5 years, 4 months ago

False because whole no. start 0 to infinitive and 0 is not a natural no.

ᵗʰⁱˢ ᵍⁱʳˡ ⁱˢ ༒︎Dᴇᴀᴅ Iɴsɪᴅᴇ༒︎✔︎ 5 years, 4 months ago

Answer: true , because natural number is starte on no. 1 to infinity but whole no. is started on 0 to infinity so it is true .

Dolly Singh 5 years, 4 months ago

True

Mantasha Mantasha 5 years, 4 months ago

Direct and indirect

ANSWER

Define of Circumcentre and Centroid of a Triangle.

Posted by Gulshan Sinku 5 years, 4 months ago

CBSE > Class 09 > Mathematics

2 answers

Meghna Thapar 5 years, 4 months ago

A circle inscribed inside a triangle is called the incenter, and has a center called the incenter. A circled drawn outside a triangle is called a circumcircle, and it's center is called the circumcenter. Drag around the vertices of the triangle to see where the centers lie.

All the vertices of a triangle are equidistant from the circumcenter. In an acute-angled triangle, circumcenter lies inside the triangle. In an obtuse-angled triangle, it lies outside of the triangle. Circumcenter lies at the midpoint of the hypotenuse side of a right-angled triangle.

My Guide ... 5 years, 4 months ago

The circumcenter is the center of the circumscribed circle (the intersection of the perpendicular bisectors of the three sides). The centroid is the intersection of the three medians of the triangle.

ANSWER

In a Right angle triangle PQR, A is the midpoint of PQ and B is the midpoint of QR with AB=5cm.What will be the length of the hypotenuse PR?

Posted by Gulshan Sinku 5 years, 4 months ago

CBSE > Class 09 > Mathematics

2 answers

Prince Pandey 5 years, 4 months ago

So, BR+BQ=5+5=10cm. Similarly, PA+AQ=10cm. So,PQ=10cm & QR=10cm. So, PR= (PQ)^2 + (QR)^2 PR= (10)^2+ (10)^2 = 100+100 PR=√200 = 14•2 (approximately)

Prince Pandey 5 years, 4 months ago

In triangle ABQ all sides are equal (since, ABQ is an equilateral triangle). So, AB=BQ=QA=5cm.

ANSWER

Draw the graph of the linear equations 3X+7y=21. Find the area bounded by the line with coordinate axes.

Posted by Gulshan Sinku 5 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Show that if the diagonals of a Quadrilateral are equal and bisect each other at right angles.Then it is a Square.

Posted by Gulshan Sinku 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

My Guide ... 5 years, 4 months ago

ANSWER Given, Diagonals are equal AC=BD .......(1) and the diagonals bisect each other at right angles OA=OC;OB=OD ...... (2) ∠AOB= ∠BOC= ∠COD= ∠AOD= 900 ..........(3) Proof: Consider △AOB and △COB OA=OC ....[from (2)] ∠AOB= ∠COB OB is the common side Therefore, △AOB≅ △COB From SAS criteria, AB=CB Similarly, we prove △AOB≅ △DOA, so AB=AD △BOC≅ △COD, so CB=DC So, AB=AD=CB=DC ....(4) So, in quadrilateral ABCD, both pairs of opposite sides are equal, hence ABCD is parallelogram In △ABC and △DCB AC=BD ...(from (1)) AB=DC ...(from $$(4)$$) BC is the common side △ABC≅ △DCB So, from SSS criteria, ∠ABC= ∠DCB Now, AB∥CD,BC is the tansversal ∠B+∠C= 180 ∠B+∠B= 180 ∠B= 90 Hence, ABCD is a parallelogram with all sides equal and one angle is 90 So, ABCD is a square. Hence proved.

ANSWER

A circular garden is situated in a city. Three girls Anandita, Bandita and Sania are sitting at equal distance on its boundary each having a toy telephone in her hands to talk each other. If the length of the string of each phone is 60 meter, find the radius of the circular garden.

Posted by Gulshan Sinku 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 5 years, 3 months ago

Answer:

the radius of the garden is 30

Step-by-step explanation:

if each girl is sitting and holding the string of phone

so, the difference between the girls will be 60.

the diameter will be 60.

and the radius will be 60 / 2 =30

ANSWER

Two parallel Chords of a circle are in the opposite side of the centre having lengths 12cm and 16cm respectively. If the smaller chord is at a distance of 8cm from the center. find the distance of the bigger chord from the center.

Posted by Gulshan Sinku 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 5 years, 3 months ago

Step-by-step explanation:

1. Given data

Radius if circle (R)=

Length of one chord () =16 cm

Length of second chord () =12 cm

2. Let perpendicular distance of chord of length 16 cm from centre of circle is

Then

...1)

On putting the respective value in equation 1)

...2)

3. Let perpendicular distance of chord of length 12 cm from centre of circle is

Then

...3)

On putting the respective value in equation 3)

...4)

5. If both is on same side with respect to centre of circle, distance between two chord

6. If both is on opposite side with respect to centre of circle, distance between two chord

ANSWER

D Is the midpoint of hypotenuse AC of a right angle triangle ABC. prove that BD=1/2 AC.

Posted by Gulshan Sinku 5 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

My Guide ... 5 years, 4 months ago

Let ∆ABC is a right triangle such that ∠B = 90 and D is mid point of AC . then we have to prove that BD = 1/2 AC we produce BD to E such that BD = AC and EC. Now is ∆ADB and ∆CDE we have AD = DC [Given] BD = DE [By construction] And, ∠ADB = ∠CDE [Vertically opposite angles] ∴ By SAS criterion of congruence we have ∆ADB ≅ ∆CDE ⇒ EC = AB and ∠CED = ∠ABD ....(i) [By cpctc] But ∠CED & ∠ABD are alternate interior angles ∴ CE ║ AB ⇒ ∠ABC + ∠ECB = 1800 [Consecutive interior angles] ⇒ 90 + ∠ECB = 1800 ⇒ ∠ECB = 900 Now, In ∆ABC & ∆ECB we have AB = EC [By (i)] BC = BC [Common] And, ∠ABC = ∠ECB = 900 ∴ BY SAS criterion of congruence ∆ABC ≅ ∆ECB ⇒ AC = EB [By cpctc] ⇒ 1/2 AC = 1/2 EB ⇒ BD = 1/2 AC

ANSWER

In this question there should be two answer Express this linear equation in this form ax+by+c=0 Questions: 5=2x

Posted by Joyeeta Mondal 5 years, 4 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Anyone here so plz talk with me

Posted by Ritika Jangra 5 years, 4 months ago

CBSE > Class 09 > Mathematics

5 answers

C Abbi 5 years, 4 months ago

Hey

《Aruba》°°° 《Sayed》❤ 5 years, 4 months ago

Hru

《Aruba》°°° 《Sayed》❤ 5 years, 4 months ago

Hii ritika.....

Ritika Jangra 5 years, 4 months ago

Hey friend jaan

Neha Jangid ??? 5 years, 4 months ago

Hlo

ANSWER

If two opposite angle of a parallelogram are (3x-2)(50-x) the the value of x.

Posted by Nitish Kumar 5 years, 4 months ago

CBSE > Class 09 > Mathematics

3 answers

Mitul Goyal 5 years, 4 months ago

..........

Amlan Panda 5 years, 4 months ago

Given two opposite angles of a parallelogram are (3x − 2)º and (50 − x)º Recall that opposite angles of a parallelogram are equal. Hence (3x − 2) = (50 − x) ⇒ 3x + x = 50 + 2 ⇒ 4x = 52 ∴ x = 13 (3x − 2)º = [3(13) − 2]º = [39 − 2]º = 37º Sum of adjacent angles is 180º Hence other two equal opposite angles = 180º − 37º = 143°

Gaurav Seth 5 years, 4 months ago

Given two opposite angles of a parallelogram are (3x − 2)º and (50 − x)º
Recall that opposite angles of a parallelogram are equal.
Hence (3x − 2) = (50 − x)
⇒ 3x + x = 50 + 2
⇒ 4x = 52
∴ x = 13
(3x − 2)º = [3(13) − 2]º = [39 − 2]º = 37º
Sum of adjacent angles is 180º
Hence other two equal opposite angles = 180º − 37º = 143°