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5pencils and 7pens together cost rs195 while 7pencils and 5pens together cost rs153.find the cost of each one of the pencil and pen

Posted by Wafiya Firdouse 2 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

Aarti Mahato 2 years, 10 months ago

Let pencil be x & pen be 7 7(5x + 7y = 195).....(1) 5(7x + 5y = 153) ....(2) 35x + 49y = 1365 35x + 25y = 765 -‐---------------------‐------- y=25 x= 4

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Kartik Upreti 2 years, 10 months ago

5x+7y=195—(1) 7x+5y=765—(2) 7×(5x+7y=195) 5×(7x+5y=765) 35x+49y=1365—(3) 35x+25y=765—(4) Elimination method se kar lena

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Roshni Jain 2 years, 10 months ago

5x+7y=195 7x+5y=153 ------------------

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ANSWER

If the zeroes of the polynomial ax²+bx+ b are in the ratio m:n, then find the value of √m/n+√n/m

Posted by Anushka Jain 2 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

Prathamesh Kharade 2 years, 10 months ago

Will you give me your mobile no.

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Prathamesh Kharade 2 years, 10 months ago

How are you

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Prathamesh Kharade 2 years, 10 months ago

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In the given figure , angle bac = 90 and ad is perpendicular to BC then:

Posted by Kunjan Kunjan 2 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

The line segment joining the points p(-3,2)and q(5,7) is divided by the y–axis in the ratio

Posted by Bhumi Gothwal 2 years, 10 months ago

CBSE > Class 10 > Mathematics

4 answers

Kartik Upreti 2 years, 10 months ago

5:3

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Antra Suman 2 years, 10 months ago

3:5

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Rdm 😈 2 years, 10 months ago

3:5

2Thank You

Kirti Rane 2 years, 10 months ago

5:3

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ANSWER

Find a quadratic polynomial, whose zeroes are reciprocals of the zeroes of the polynomial x ^ 2 - x - i

Posted by Anshul Kumar 2 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Common tangent PQ and rs to two circles intersect at A prove that PQ= RS

Posted by Jai Shikha Sharma 2 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Rdm 😈 2 years, 10 months ago

PA & RA be x ( these are equal as tangent drawn from a outside point of circle to a circle are equal) Similarly AS & AQ be y x + y = x + y PQ = RS Hence proved

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Which of the following is not irrational a) (2-√3)2 b) (√2+√3)2 C) (√2-√3) (√2+√3) d) 27√7

Posted by Kaver Mokashi 2 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

Kirti Rane 2 years, 10 months ago

1Thank You

Jagdish Shukla 2 years, 10 months ago

(C)

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Aman Sharma 2 years, 10 months ago

2Thank You

ANSWER

If the sum of first 7 terms of as AP is 49 and that of 17 terms is 289,find the AP

Posted by Dipender Saini 2 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Aman Sharma 2 years, 10 months ago

7/2(2a+6D)=49 , 17/2(2a+16D)=289 7a+42D=49 , 17a+272D=289 a+6D=7-(1) , a+16D=17 =)a+6D=7 =)a+16D=17 -10D=-10 D=1 a=7-6(1) a=7-6 a=1 A.P.:-1,2,3,4....

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If the quadratic equation px² - 2√5 px + 15=0, has two equal roots then find the value of p.

Posted by Ishit Gajbhiye 2 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Rdm 😈 2 years, 10 months ago

p= 3

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Devendra Sahu 2 years, 10 months ago

b^2-4ac=0 (-2√5p)^2-4*p*15=0 20p^2-60p=0 20p(p-3)=0 20p=0. p-3=0 p=0. p=3 p=0 is rejected as it will not remain a quadratic equation Therefore p=3

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Solve case study Use the Cornell note taking method to make notes of the following passage Everyone needs a holiday, both to relax and to have a change of environment. The holidaymakers feel relaxed and refreshed at the end of the holiday and look forward to the resumption of their duties, be it at school, office, or factories, with renewed vigour. This is the reason why all establishments grant their employees annual leave. With the end of the academic year, the schools and universities grant their pupils a long holiday during mid-summer. This lasts until early September when the new school term starts. Of course, the parents will like to take advantage of this and take their leave to coincide with the children’s vacations. This has become a traditional holiday season in most European countries, particularly in England. With the coming of August, the traditional holiday season in Britain reaches its peak point and most of the holiday resorts are packed to capacity. In order to avoid the crowd, some prefer to take their holiday a little earlier if facilities so warrant. Those who have already taken their holidays can console themselves not only with reflections on the happy days spent in the country, at the seaside or abroad but also with the thought that holiday expenses are over for the year and that by taking an earlier holiday they have missed the August rush.

Posted by Aditya Kediya 2 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Pramodh R 2 years, 10 months ago

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ANSWER

Advita is practicing her dance steps for the competition. She starts practicing the steps for 1 hour on the first day and then increase the practice time by 10 minutes each day. If the pattern continues, how many minutes will she spend practicing on the 7th day ?

Posted by Aditya Kediya 2 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Rdm 😈 2 years, 10 months ago

2 hours or 120 min

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ANSWER

What is Baudhayan theorem

Posted by Ankit Class 2 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Kaver Mokashi 2 years, 10 months ago

Pythogaros theorem

1Thank You

Aditya Kediya 2 years, 10 months ago

Also known as Pythagoras theorem H²=P²+ B²

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ANSWER

ex 14.1 class 10

Posted by Alisha Jain 2 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

2x + 3y = 8 ; 6x + 9y = 17

Posted by Shiva Teja 2 years, 10 months ago

CBSE > Class 10 > Mathematics

5 answers

Ankit Rai 2 years, 10 months ago

No solution

0Thank You

Saud Ansari 2 years, 10 months ago

No solution

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Yash Kumar 2 years, 10 months ago

Solve question

1Thank You

Yash Kumar 2 years, 10 months ago

Answer

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Swastik Sharma 2 years, 10 months ago

Parallel line. 🙂

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ANSWER

Find the area of the quadrilateral ABCD whose vertices are A(-4,-3) , (3,-1), C(0,5) ,and D(-4,2).

Posted by Rashi Choure 2 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

Rashi Choure 2 years, 10 months ago

Pushpak If you know the answer then tell, no need to talk unnecessary..!!

0Thank You

Pushpak Singh 2 years, 10 months ago

Khud se bhi kuch karliya karo

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Gayatri Sabara 2 years, 10 months ago

Put distance formula n find urself..

3Thank You

ANSWER

Proved that 2+2=5

Posted by Aryan Sahu 2 years, 10 months ago

CBSE > Class 10 > Mathematics

4 answers

Ankit Class 2 years, 10 months ago

20-20=25-25 4(5-5)= 5(5-5) 4=5 2+2=5 But we can't do like this because if it then we can write 0= 0 3×0=4×0 By cancle zero from both side we get 3 =4 . But it is not possible

2Thank You

Ankit Class 2 years, 10 months ago

Simply it can't be proved if we do so the it will break law of mathmatics

2Thank You

Niharika Bhardwaj 2 years, 10 months ago

Sir how to write the outcomes of geting an ace from 52 card I know the answer but i don't know that to write it in sample space

5Thank You

Agampreet Singh 2 years, 10 months ago

4-4+4-4=5 2+2=5 Hence Proved.

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ANSWER

Find a point in y axis equidistant from (-2,3)&(4,5)

Posted by Harshit Mohar 2 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

Ankit Rai 2 years, 10 months ago

(0,7)

0Thank You

Shresth Yadav 2 years, 10 months ago

√625

1Thank You

Sachin Singh 2 years, 10 months ago

(0,7) are the points..🙂

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ANSWER

cos 38°.cos 52° - sin 38°.sin 52° = cos 90°

Posted by Rashi Choure 2 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Ankit Rai 2 years, 10 months ago

0=0

0Thank You

Nitesh Yadav 2 years, 10 months ago

Ya deleted hai syllabus sa

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ANSWER

7. If cosec theta - cot theta = 2/3 then value of cosec 0 is:

Posted by Shashant Joon 2 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

B 01 Rojalin Behera 2 years, 10 months ago

1+cot2 theta =cosec2 theta 1=cosec2 theta - cot2 theta 1=(cosec theta - cot theta)(cosec theta+cot theta) 1=2/3(cosec theta+ cot theta) 3/2=cosec theta+ cot theta ....(1) 2/3=cosec theta - cot theta....(2) Add equation (1) and (2) (Cosec theta+ cot theta)+(cosec theta - cot theta)=(3/2)+(2/3) 2cosec theta=13/6 . . .cosec theta=13/12

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ANSWER

A solid metallic object is shaped like a double cone as shown in the figure.Radius of base of both cones is same but their heights are different.If this cone is immersed in water,find the quantity of water it will displace.

Posted by Shanu Yadav 2 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Preeti Dabral 2 years, 10 months ago

According to the question,
Radius of the cones= r
Height of the upper cone= h
Height of the lower cone= H
Volume of the upper cone {tex}= \frac { 1 } { 3 } \pi r ^ { 2 } h{/tex}
Volume of the lower cone {tex}= \frac { 1 } { 3 } \pi r ^ { 2 } H{/tex}
Total volume of both the cones {tex}= \frac { 1 } { 3 } \pi r ^ { 2 } h + \frac { 1 } { 3 } \pi r ^ { 2 } H{/tex}
{tex}= \frac { 1 } { 3 } \pi r ^ { 2 } ( h + H ){/tex}
The quantity of water displaced by the cones = The total volume of both the cones
therefore,
The quantity of water displaced will be {tex}\frac { 1 } { 3 } \pi r ^ { 2 } ( h + H ) \text { units } ^ { 3 }{/tex}

3Thank You

Shanu Yadav 2 years, 10 months ago

Thanks

2Thank You

ANSWER

Which of the following is a polynomial?(a)

Posted by Humera Tasneem 2 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Shanu Yadav 2 years, 10 months ago

Where are the options

5Thank You

ANSWER

Solve for x in terms of a and b:a/x-b+b/x-a=2,x not equal to a and b

Posted by Sarojini Sarojini 2 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Sumit Sharma 2 years, 10 months ago

Sumit Sharma

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ANSWER

An aeroplane when 3000 m high passes vertically about another aeroplane at an instant when the angle of elevation of the two airplane from the same point on the ground as 60 degree and 45 degree respectively find the vertical distance between the two plane

Posted by Rdm 😈 2 years, 10 months ago

CBSE > Class 10 > Mathematics

4 answers

Ankit Class 2 years, 10 months ago

1.73

0Thank You

Touheed Khan 2 years, 10 months ago

Value of √3

1Thank You

Yogesh Gurjar 2 years, 10 months ago

1000(3-√3)m

2Thank You

Ankit Class 2 years, 10 months ago

1000(3-√3)m

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ANSWER

If I had work 5/2 km/h faster, I would have taken half an hour left to work 15 km find out my feet

Posted by Rdm 😈 2 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Rdm 😈 2 years, 10 months ago

Then don't dare to go in board exams... 😎

1Thank You

Vivek Prajapati 2 years, 10 months ago

I don't touch easy question

1Thank You

ANSWER

The area of the minor segment of a circle of radius 14 cm and the corresponding sector is 60°

Posted by Rdm 😈 2 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

X A 44 Spandan Kumar 5223 2 years, 10 months ago

its (308/3)cm^2. the formula is (πr^2θ)/360 '^' means after this symbol the number will be an exponent of the letter or number before'^' this symbol

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Touheed Khan 2 years, 10 months ago

102.666666667

1Thank You

Rdm 😈 2 years, 10 months ago

308/3- 49√3

2Thank You

ANSWER

By factorisation method ( x - 3 ) ( x - 4 ) = 34/(33) ^2

Posted by Rdm 😈 2 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Preeti Dabral 2 years, 10 months ago

{tex}Here, we have \begin{aligned} & \Rightarrow(x-3)(x-4)=34 / 33^2 \\ & \Rightarrow x^2-7 x+12-34 / 33^2=0 \\ & \Rightarrow x^2-7 x+13034 / 33^2=0 \\ & \Rightarrow x^2-7 x+98 / 33 \times 133 / 33=0 \\ & \Rightarrow x^2-231 / 33 x+98 / 33 \times 133 / 33=0 \end{aligned} {/tex}
{tex}By using factorization method, we get \begin{aligned} & \Rightarrow x^2-(98 / 33+133 / 33) x+98 / 33 \times 133 / 33=0 \\ & \Rightarrow x^2-98 / 33 x-133 / 33 x+98 / 33 \times 133 / 33=0 \\ & \Rightarrow\left(x^2-98 / 33 x\right)-(133 / 33 x-98 / 33 \times 133 / 33)=0 \\ & \Rightarrow x(x-98 / 33)-133 / 33(x-98 / 33)=0 \\ & \Rightarrow(x-98 / 33)(x-133 / 33)=0 \\ & \Rightarrow x-98 / 33=0 \text { or } x-133 / 33= \\ & \Rightarrow x=98 / 33,133 / 33 \\ & \text { Hence, } x=x=98 / 33,133 / 33 \end{aligned} {/tex}

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Write the forth term of ap 3,6,9.....?

Posted by Yogesh Gurjar 2 years, 10 months ago

CBSE > Class 10 > Mathematics

5 answers

G Vishal 2 years, 10 months ago

1Thank You

Shlok Gupta 2 years, 10 months ago

Yes 12

1Thank You

Suryansh Pandey 2 years, 10 months ago

1Thank You

Rdm 😈 2 years, 10 months ago

1Thank You

Shagun Saini 2 years, 10 months ago

2Thank You

ANSWER

If 1+ sin² B = 3sin B cos B, prove that tan B = 1 or ½.

Posted by . Anisha 2 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Badal Singh 2 years, 10 months ago

Case study

9Thank You

ANSWER

3x-5y-7=0 and 6x-10y-3=0

Posted by Dilsad Alam 2 years, 10 months ago

CBSE > Class 10 > Mathematics

4 answers

Shresth Yadav 2 years, 10 months ago

Parallel No solution

0Thank You

Kashish Yadav 2 years, 10 months ago

It is wrong answer No solution

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Kashish Yadav 2 years, 10 months ago

3x-5y=7 3x = 7+5y x=7+5y 6(7+5y)- 1Oy = 3 42 + 30y - 1Oy =3 20y=3-42 20y=39 y=39/20 3x-5 (39/20) = 7 3x-5 (39/4)=7 12x-195=7 12x=7+195 12x = 202 X=202/12 X= 101/6

3Thank You

Emil Leo 2 years, 10 months ago

Don't know

1Thank You

ANSWER

23 factors

Posted by Suraj Pal Rupesh 2 years, 10 months ago

CBSE > Class 10 > Mathematics