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The class marks of distribution are 47,52,57,62,67,72,77,82.Determine the class size, class limits, true class limits?

Posted by Rishav Singh 4 years, 9 months ago

1 answers

Yogita Ingle 4 years, 9 months ago

Class mark = x
x₂-x₁=52-47=5
lower limit = xi -5
upper limit =xi+5

class limits 42-52,52-57,57-62,62-67,67-72,72-77,77-82
class size =h = difference between two lower limits
=52-42=10

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Prove that diameter is the longest cord of circle

Posted by Rony Saha 4 years, 9 months ago

CBSE > Class 09 > Mathematics

0 answers

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What is Pythagoras theorem explain

Posted by Zeenat Khanam 4 years, 9 months ago

CBSE > Class 09 > Mathematics

2 answers

Keerthana Vijayan 4 years, 9 months ago

Hypotenuse square = Base square + Altitude square

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Sukhveer Singh 4 years, 9 months ago

H2 = p2+b2

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What is the identity a^10-b^10

Posted by Arun Kumar 4 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Anurag Kumar 4 years, 8 months ago

=(a^5)^2-(b^5)^2 =(a^5+b^5)(a^5-a^5)

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Define chord

Posted by Kunal Parmar 4 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Vinod Kumar Rai 4 years, 9 months ago

Chord of circle is a straight line segment whose starting point and ending point both on the circle is called cord

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Find the value of k x minus 1 is a factor of the X square + 9 x - 5 +

Posted by Yash Raj Rathod 4 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Amu Adi Chauhan 4 years, 9 months ago

X-1=0 X=-1 = Now, X^2+9x-5+k=0 = Put the value of x here = (-1)×2+9×(-1)-5+k=0 = -2-9-5+k=0 = -11-5+k=0 = -16+k=0 = K=16 ans Hope it's help you

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Evaluate 8136 x square minus y square upon 25

Posted by Yash Raj Rathod 4 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Yash Raj Rathod 4 years, 9 months ago

Find the value of M if 343 m is equal to 49 upon 7m

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IF x+y = -4 and xy = 2 then the value of x square + y square = ?

Posted by Amit Kumar Giri 4 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Namrata Jindal 4 years, 9 months ago

x^2+y^2=(x+y)^2 - 2xy =(-4)^2 - 2*2 =16-4 =12

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Facyorise 9(x_2y)

Posted by Dimpal Modanwal 4 years, 9 months ago

CBSE > Class 09 > Mathematics

0 answers

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x+y+z =0 show that xcube+ ycube+zcube=3xyz

Posted by Sagar Bhati 4 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Yashraj Kumar 4 years, 9 months ago

x+y+z=0 x+y=-z (x+y)3=(-z3) x3+y3+3xy(x+y)=-z3 As x+y=-z => x3+y3+3xy(-z)=-z3 x3+y3-3xyz=-z3 x3+y3+z3=3xyz Hence proved Have a good day ?

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Sum of all the angles of triangles is 180

Posted by Hero Sharma 4 years, 9 months ago

CBSE > Class 09 > Mathematics

3 answers

Jahanvi Sharma 4 years, 9 months ago

Yes

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Yashraj Kumar 4 years, 9 months ago

Yes it is

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Varun Yadav 4 years, 9 months ago

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The length breadth and height of a cuboid are 15 cm 12 cm and 4.5 cm respectively .its volume is

Posted by Jahangir Khan 4 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Himanshu Kasaudhan 4 years, 9 months ago

Volume of cuboid=l*b*h So,the volume will be 15*12*4.5 Answer is 15*54.6 =819.0

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Factorise: a(a-1)-b(b-1)

Posted by Mukul Kumar 4 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Adil Adil 4 years, 9 months ago

Rdgf

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a+b+c=8 and ab+bc+ca=19.find(a2+b2+c2).2 is square power.

Posted by Mukul Kumar 4 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Anurag Kumar 4 years, 8 months ago

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Find irrational number between 3 and 5

Posted by Subeda Udaykumar 4 years, 9 months ago

CBSE > Class 09 > Mathematics

0 answers

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A die is thrown once. What is a probability of getting number 3 or 6

Posted by Harsharan Kaur 4 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Sudesh Rani 4 years, 9 months ago

One by three is the answer

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Find the value of: (4/(216)‐⅔)+(1/(256)‐¾)+(2/(243)‐⅕)

Posted by Japneet Kaur 1 year ago

CBSE > Class 09 > Mathematics

0 answers

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Two coins are tossed simult aneusly. List all possible outcomes.

Posted by Jaya Singh 4 years, 9 months ago

CBSE > Class 09 > Mathematics

0 answers

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In fig AB is a diameter of the circle , CD is achord equal to rafius of the circle .AC and BD , when peoduced , intersrct at a poiy E . Prove that angle AEB = 60°

Posted by Pramila Pe 4 years, 9 months ago

CBSE > Class 09 > Mathematics

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in a society ball 8children out of 30 did not participate in the campaign .find the probability that a child selected at random,find the probability of participated in campaign

Posted by Adarsh Anand 4 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Jyoti Kushwah 4 years, 9 months ago

P(e) = 30-8/30 22/30

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The curved surface area of a cylinder is 154cmsquare . The total surface area of the cylinder three times it's curved surface area. Find the volume of the cylinder.

Posted by Arif Siddiqui 4 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 4 years, 9 months ago

T.S.A = 3×154 = 462 cm²

C.S.A = 154 cm²

C.S.A = 2πrh

T.S.A = 2πr(r+h)

Now,

In T.S.A = 2πrr + 2πrh

462 = 2πrr + 2πrh

462 = 2×22/7×r×r + 154

462 – 154 = 2×22/7×r×r

308×7/2×22 = r×r

49 = r×r

R = 7 cm

Now,

C.S.A = 2πrh

154 = 2×22/7×7×h

154/44 = h

7/2 =h

H = 3.5 cm or 7/2 cm

Now volume = πrrh

= 22/7× 7× 7×7/2

= 11×49

= 539 cm³

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Without using protactor make an angle of 45

Posted by Ashok Chauhan 4 years, 9 months ago

CBSE > Class 09 > Mathematics

3 answers

Yash Raj Rathod 4 years, 9 months ago

yes

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Sudesh Rani 4 years, 9 months ago

With the help of a compass draw a semicircle. Then, draw an arc of sixty degree and then of one twenty degree . Afterwards, draw an arc from an angle of sixty and one twenty degree of an angle. Now, join that and we have an angle of ninety degree . From the angle of zero degree and ninety degree draw an arc and then join the line . At last, the angle which we are having is of forty-five degree .

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Himanshu Singh 4 years, 9 months ago

Make with compass

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The volume of a rectangular solid measuring 1m by 50 cm by 0.5 m is

Posted by Nitu Choudhary 4 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Anurag Kumar 4 years, 8 months ago

25cm^3

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The perimeter of square ABCD is 100 cm. Then find length PQ

Posted by Reena Patel 4 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Anurag Kumar 4 years, 8 months ago

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Class 9 ch circle theoram 10.5

Posted by Rony Saha 4 years, 9 months ago

CBSE > Class 09 > Mathematics

0 answers

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Formula for equilateral triangle

Posted by Satpal Singh 4 years, 9 months ago

CBSE > Class 09 > Mathematics

2 answers

Sudesh Rani 4 years, 9 months ago

Area is √3/4 *(side)^2

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Mehak ❤️ 4 years, 9 months ago

Area of Equilateral Triangle (A) = (√3/4)a^2

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In fig.6.16, if x+y=w+z, then prove that AOB is a line

Posted by Adarsh Sharma 4 years, 9 months ago

CBSE > Class 09 > Mathematics

1 answers

Mehak ❤️ 4 years, 9 months ago

Solution: Sum of all angles in a circle always 360° Hence ∠AOC + ∠BOC + ∠DOB + ∠AOD = 360° => x + y + w + z = 360° => x + y + x + y = 360° Given that x + y = w + z Plug the value we get => 2w + 2z = 360° => 2(w + z) = 360° w + z = 180° (linear pair) or ∠BOD + ∠AOD = 180° If the sum of two adjacent angles is 180°, then the non-common arms of the angles form a line Hence AOB is a line.

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If x+1/x=5 then find the value of x^6+1/x^6

Posted by Kalawati Singh 4 years, 9 months ago

CBSE > Class 09 > Mathematics