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The sum of four number in A.P is 50 ,and the greatest number four times the least.Find the number.

Posted by Jagrati Sharma?? 5 years, 4 months ago

CBSE > Class 10 > Mathematics

5 answers

Jagrati Sharma?? 5 years, 3 months ago

Other student tell me ans. of this que...

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Jagrati Sharma?? 5 years, 3 months ago

Thanks bhavya....

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Jagrati Sharma?? 5 years, 4 months ago

What Se (to Arun )

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Bhavya Kapoor 5 years, 4 months ago

Let the first no. be 'a' Therefore the terms of the AP are a , a+d ,a+2d ,a+3d. So, a+(a+d)+(a+2d)+(a+3d)=50 4a+6d=50 2a + 3d = 25.......i now we know that the 4th term is 4times the first term. Therefore, 4a = a+3d 3a = 3d a = d......ii Substituting ii in i we get 2a+3a=25 a = 5 Thus the AP is 5 , 10 , 15 , 20 ....

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Arun Arun 5 years, 4 months ago

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When a coin is tossed 50 times find tbe probability of getting head and tail

Posted by Moksha Maheta 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Aman Kumar 5 years, 4 months ago

Head head , tail tail , tail head

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1 Percent equals to how many Marks

Posted by Riyana D'Cunha 5 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Yukti Sood 5 years, 4 months ago

But it is different for different total marks

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Yukti Sood 5 years, 4 months ago

1 per cent means that you get 1 mark out of 100 marks

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Find the quadratic polynomial the sum of whose zeroes is _10 and product of its zeroes is _39

Posted by Aniket Pandey 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Deepa Kumari 5 years, 4 months ago

x^2-10x-39

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3x-5y=7 6x-10y=3

Posted by Veshu Pathak 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 5 years, 4 months ago

3x-5y=7--->1

6x-10y=3--->2

Multiple eq 1 with 2

Such that, 6x-10y=14

Now, substrat 1 from 2

6x-10y=14

-(6x-10y=3)

--------------

12x=3

X=3/12

X=⅓

Sub X value in any equation,

6(⅓)-10y=3

2-10y=3

-10y=3/2

-y=3/2/10

-y=3/20

y=-3/20

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Five years ago arjun was thrice old as sonu ten years later arjun will be twice old as sonu how old are arjun and sonu

Posted by Desy Joseph 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Gaurav Seth 5 years, 4 months ago

Let the present age of Arjun be x years and present age of sonu be y years.

According to given conditions,

5 years ago,

x - 5 = 3(y - 5)

x - 3y = -10 ...... (Eqn 1)

10 year later,

x + 10 = 2(y + 10)

x - 2y = 10 ........ (Eqn 2)

On subtracting eqn 1 from 2,

(x - 2y) - (x - 3y) = 10 + 10

-2y + 3y = 20

y = 20

On substituting y = 20 in eqn 2,

x = 2 × 20 + 10

x = 50

Hence present age of Arjun is 50 years and present age of Sonu is 20 years

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The seventh term from the last term of the AP:27,36,45,............180

Posted by Yash Goyal 5 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Moksha Maheta 5 years, 4 months ago

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Tarannum Jahan 5 years, 4 months ago

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X+1/X-1+X-2/X+2=3

Posted by Abhishek Kumar 5 years, 4 months ago

CBSE > Class 10 > Mathematics

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. On a morning walk, three persons step off together and their steps measure 40 cm, 42 cm and 45 cm respectively. What is the minimum distance each should walk so that each can cover the same distance in complete steps? *

Posted by Surendra Gehlot 5 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Yogita Ingle 5 years, 4 months ago

We have to find the LCM of 40 cm, 42 cm and 45 cm to get the required minimum distance. Because we are asked the minimum distance
Now,
40 = 2 × 2 × 2 × 5,
42 = 2 × 3 × 7
45 = 3 × 3 × 5
∴ LCM (40, 42, 45) = 2 × 3 × 5 × 2 × 2 × 3 × 7 = 30 × 12 × 7 = 210 × 12 = 2520

Minimum distance each should walk 2520 cm. so that, each can cover the same distance in complete steps.

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Aditri Mandal 5 years, 4 months ago

2520

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D is a point on the side BC of a triangle ABC such that angle ADC=angle BAC.Show that CAsquare=CB.CD.

Posted by Narinder Singh Singh 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Gaurav Seth 5 years, 4 months ago

In ΔADC and ΔBAC,
∠ADC = ∠BAC (Given)
∠ACD = ∠BCA (Common angle)
∴ ΔADC ~ ΔBAC (By AA similarity criterion)
We know that corresponding sides of similar triangles are in proportion.

∴ CA/CB =CD/CA

⇒ CA2 = CB.CD.

An alternate method:

Given in ΔABC, ∠ADC = ∠BAC
Consider ΔBAC and ΔADC
∠ADC = ∠BAC (Given)
∠C = ∠C (Common angle)
∴ ΔBAC ~ ΔADC (AA similarity criterion)

⇒

∴ CB x CD = CA²

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ANSWER

Euclid divisin lemma 196 and 38220

Posted by Sukhchain Saini 5 years, 4 months ago

CBSE > Class 10 > Mathematics

3 answers

Yukti Sood 5 years, 4 months ago

From cbse board ex 1.1 has been deleted. You don't have to practise this exercise

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Yogita Ingle 5 years, 4 months ago

In the given pair, 38220 > 196, thus let 38220 = a and 196 = b

Now by applying the Euclid’s division algorithm, we get

38220=196×195+0 (Here q=195 and r=0)

Since, in the above equation we get, r = 0, therefore, 196 is the HCF of the given pair 196 and 38220.

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Vishvajit Yadav 5 years, 4 months ago

solution let a=38220 and b= 196 from euclid division lemma a=bq+r 38220=196×195+0 HCF=196

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Evaluate the following: 3- cos45 _________ Sec 35+cosec30

Posted by Sidharth Charan 5 years, 4 months ago

CBSE > Class 10 > Mathematics

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The sum of zeroesof a quadratic polynomial15/4 and their product is 3. find the polynomial

Posted by Givaway Gamer 5 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Narinder Singh Singh 5 years, 4 months ago

We know that alpha+beta=-b/a=15/4 and alpha×beta=c/a=3=12/4 Hence polynomial formed is 4xsquare-15x+12

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Khawaish Taneja 5 years, 4 months ago

X^2 +15/4x+3

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9÷3×3=?

Posted by Ajay Yadav 5 years, 4 months ago

CBSE > Class 10 > Mathematics

5 answers

Narinder Singh Singh 5 years, 4 months ago

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Trina Baruah 5 years, 4 months ago

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Shivam Rai 5 years, 4 months ago

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Shaurya Kaushik 5 years, 4 months ago

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Riyana D'Cunha 5 years, 4 months ago

9÷3×3= 3×3= 9

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Which topics are deleted in mathematics

Posted by Himanshu Vaishnav 5 years, 4 months ago

CBSE > Class 10 > Mathematics

3 answers

Tarannum Jahan 5 years, 3 months ago

I-NUMBER SYSTEMS REAL NUMBERS  Euclid’s division lemma UNIT II-ALGEBRA POLYNOMIALS  Statement and simple problems on division algorithm for polynomials with real coefficients. PAIR OF LINEAR EQUATIONS IN TWO VARIABLES  cross multiplication method QUADRATIC EQUATIONS Situational problems based on equations reducible to quadratic equations ARITHMETIC PROGRESSIONS Application in solving daily life problems based on sum to n terms UNIT III-COORDINATE GEOMETRY COORDINATE GEOMETRY  Area of a triangle. UNIT IV-GEOMETRY TRIANGLES Proof of the following theorems are deleted The ratio of the areas of two similar triangles is equal to the ratio of the squares of their corresponding sides.  In a triangle, if the square on one side is equal to sum of the squares on the other two sides, the angle opposite to the first side is a right angle. CIRCLES No deletion CONSTRUCTIONS  Construction of a triangle similar to a given triangle. UNIT V- TRIGONOMETRY INTRODUCTION TO TRIGONOMETRY  motivate the ratios whichever are defined at 0o and 90o TRIGONOMETRIC IDENTITIES Trigonometric ratios of complementary angles. HEIGHTS AND DISTANCES No deletion UNIT VI-MENSURATION AREAS RELATED TO CIRCLES  Problems on central angle of 120° SURFACE AREAS AND VOLUMES  Frustum of a cone. UNIT VI-STATISTICS & PROBABILITY STATISTICS  Step deviation Method for finding the mean  Cumulative Frequency graph PROBABILITY No deletion

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Yukti Sood 5 years, 4 months ago

Exercise - 1.1 Exercise - 2.3 Use of cross multiplication method in ch. 3 Q.3, 4, 8, 9, 10 of Exercise - 4.3 Q. 15 to Q. 20 of Exercise - 5.3 Theorem 6.6 and 6.9 Exercise- 7.3 Exercise - 8.3 Q. 2 to 7 of Exercise 11.1 Q. 7 of Exercise 12.2 and Q. 6 of Exercise 12.3 Exercise - 13.4 Exercise- 14.4 and use of step deviation method for finding mean

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Riyana D'Cunha 5 years, 4 months ago

http://cbseacademic.nic.in/Revisedcurriculum_2021.html . Go on the above link and select Math u will get which topics r deleted.

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if alpha and beta are zeros of the polynomial x square - 3 bracket open X + 1 bracket close + c such that alpha + 1 Oz into beta + 1 is equal to zero then find the value of c

Posted by Nivesh M 5 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

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In an AP if 3times the 4th term is equal to 2times the 7th term the ratio of 7th and 10th term

Posted by Sanchana K 5 years, 4 months ago

CBSE > Class 10 > Mathematics

4 answers

Shivam Rai 5 years, 4 months ago

3:4

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Anjali Patel 5 years, 4 months ago

3:4

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Govind Prasad 5 years, 4 months ago

I don't how to solve

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Govind Prasad 5 years, 4 months ago

114

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1/4x_ 1/9y=76 3/x+99/y=67 Solve this equation by reducing them to a pair of linear equation.

Posted by Govind Prasad 5 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

The amount of money in the account every year when rupees 10,000is deposited at compound interest at 8%per annum

Posted by Lavanya Suresh 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Govind Prasad 5 years, 4 months ago

8000

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What is alzebra

Posted by Devesh Gupta 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Govind Prasad 5 years, 4 months ago

Algebra spelling is wrong

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If a polynomial x^4+5x^3+4x^2-10x-12 two zeroes as -2 and -3, then find the other zeroes

Posted by Riya Patel 5 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

x+1/x-1 + x-2/x+2 = 4-2x+3/x+2

Posted by Manav Garg 5 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Ayaan Sabharwal 5 years, 4 months ago

.........

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Ayaan Sabharwal 5 years, 3 months ago

Kg iviikgjjvifijvjj j jvijtjt.tfmvkgt gigkgotjyjgofotk yigifkthtbg

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If a=5 common difference (d) =2k-8 ,k=???

Posted by Sumit Sharma 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Akhilesh Padti 5 years, 4 months ago

6.5

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Plz tell me all Ques no. Related to which exercise which are deleted from Ch 5 arithmetic progression

Posted by Somya Dhawan 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Anwesha :) 5 years, 4 months ago

Ex- 5.3 Q no. 15, 16, 17, 18, 19, 20 Please note, only real life based situation questions are deleted. The questions can be asked directly.

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Fundamental theoram of arithmetics

Posted by Athulya Manikandan 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Chandresh Tiwari 5 years, 4 months ago

The fundamental theorem of arithmetic says that every composite number can be factorized as a product of primes actually it says more. it says that given any composite number it can be factorized as a product of prime numbers in a unique way , except for the order in which the primes occur .

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1 upon 2 X + 1 upon 3 y is equals to 2 and 1 upon 3 X + 1 upon 2 y is equals to 13 upon 6 solve by elimination method

Posted by Pranjal Devashish 5 years, 4 months ago

CBSE > Class 10 > Mathematics