CBSE > Class 10 > Mathematics | CBSE Board | Homework Help

To prove - 22/7 is a rational number. So first recall the definition of a rational number that is- " A rational number can be represented in the form of p/q where p and q are integers and q#0". Also- "Decimal expansion of rational no . is either terminatinating or repeating" . So here in this case 22 and 7 are integers . 7#0 And also - Decimal expansion of 22/7 is 3.14285714 that is nothing but terminating . Hence , by both the ways 22/7 is a rational number.

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Happy Sin 6 years, 9 months ago

hemce proved

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56+67

Posted by Shahrukh Khan 6 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Manav Kakkar 6 years, 9 months ago

123

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Kaira Chauhan 6 years, 9 months ago

123....

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Yasmine ♥️ 6 years, 9 months ago

123

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If a boy is five times old as his fater find the oge of boy

Posted by Syed Ali 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Ashish Agrawal 6 years, 9 months ago

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on comparing with a1÷a2,b1÷b2,c1÷c2 find out wheather the lines representing 5x-4x+8=0,7x+6x-9=0

Posted by Parv Sachd 6 years, 9 months ago

CBSE > Class 10 > Mathematics

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A boat moves downstream at the rate of 1 km in 7.5minutes and upstream at the rate of 5km an hour.What isthespeed of the boat in the still water?

Posted by Anjali Kumari 6 years, 9 months ago

CBSE > Class 10 > Mathematics

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5 years ago ,Gouri was thrice as old as Ganesh . Ten years later Gouri will be twice as old as Ganesh. How old are Ganesh and Gouri

Posted by Shafeera Farheen 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 4 months ago

Let the present ages of B and A be x years and y years respectively.
Then,
B's age 5 years ago = {tex}(x - 5) years{/tex}
and A's age 5 years ago = {tex}(y - 5) years.{/tex}
{tex}\therefore{/tex} {tex}(y - 5) = 3(x - 5){/tex} {tex}\Rightarrow{/tex}{tex}3x -y = 10{/tex} .... (i)
B's age 10 years hence = {tex}(x +10) years{/tex}.
A's age 10 years hence = {tex}(y +10) years{/tex}.
{tex}\therefore{/tex} {tex}(y + 10) = 2(x + 10){/tex} {tex}\Rightarrow{/tex} {tex}2x - y = - 10{/tex} ..... (ii)
On subtracting (ii) from (i), we get x = 20.
Putting x = 20 in (i), we get
(3{tex}\times{/tex}20) - y = 10 {tex}\Rightarrow{/tex}y = 60 -10 = 50.
{tex}\therefore{/tex} x = 20 and y = 50.
{tex}\text{Hence, B's present age = 20 years}{/tex}
{tex}\text{and A's present age = 50 years.}{/tex}

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If 2 and 3 are the zeroes of the polynomial3x²-2kx+2m,then find the value of k and m

Posted by Ansh Thakur 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Shalbi Kumari 6 years, 9 months ago

K=7.5 and m=9 Since we know that sum of zeros is equal to -(co- efficient of x)/ co- efficient of x sq. And product of zeros is equal to constant term(c)/co efficient of x sq.

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If the polynomial p(x)=x^2-x+1 is divided by (x-2) than the remainder is

Posted by Amit Bharti 6 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

?Ariana Grande Fan ~Ishit ×_×? 6 years, 9 months ago

Aree newcomer hoga

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Isha Kapoor 6 years, 9 months ago

Mathematics exam is over

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Ishu please forgive me..... I have a friend like friend ....she said and she wants you became my sister.. ???????

Posted by Aarmaan Bedil 6 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Aarmaan Bedil 6 years, 9 months ago

Ya.......

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Isha Kapoor 6 years, 9 months ago

Are you there

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Isha Kapoor 6 years, 9 months ago

Whatttttt......

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What is trigonametri

Posted by Yuraj Singh 6 years, 9 months ago

CBSE > Class 10 > Mathematics

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If the sides of a triangle increased thrice then how the area will increase

Posted by Greeshma Rajan 6 years, 9 months ago

CBSE > Class 10 > Mathematics

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What is value of alpha and beta

Posted by Piyush Raghuwanshi 6 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Nikhil 6 years, 9 months ago

-b/a = a + b............. c/a = ab........................... a = alpha and b= beta

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Piyush Raghuwanshi 6 years, 9 months ago

-b by a = alpha and c by a = beta ,aata toh hai nhi kuch

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If alpha and beta are the zeros of the quadratic polynomial FX equal to x square - 5 x + 4 find the value of 1 upon alpha plus one upon beta minus 2 into Alpha into beta

Posted by Pushpraj Pandey 6 years, 9 months ago

CBSE > Class 10 > Mathematics

4 answers

Pushpraj Pandey 6 years, 9 months ago

Mehar Danish Mallick thank you for telling me the answer

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Mehar Danish Mallick 6 years, 9 months ago

x² + 5x + 4 has zeroes α and β then, value of = {1/α + 1/β - 2 • αβ} Solution:- {x² +5x + 4} α+β = -b/a (sum of the zeroes) α+β = -5/1 [α+β = -5]............(i) α•β = c/a (product of the zeroes) αβ = 4/1 [αβ = 4]................(ii) Now taking , = 1/α + 1/β - 2 • αβ = β+α/αβ - 2 • αβ (taking LCM) = α+β/αβ - 2 • αβ = (-5)/(4) - 2 • (4) (from i and ii) = -5/4 - 8 = -5 -32 / 4 (taking LCM) = -37/4 = -9.25 [Ans] Hence , the required value is {-37/4 OR -9.25}

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Nitin Kumar ✨✨?????✨✨ 6 years, 9 months ago

Soryy

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Nitin Kumar ✨✨?????✨✨ 6 years, 9 months ago

Bs ab tension krne ki baat nahi hai

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The L.C.M of 2 nos. is 51 times the H.C.F and if 1 no. is 27,find the other no.

Posted by Khushi Gaba 6 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Toughest question of trignometry

Posted by Raghav Tiwari Raghav Tiwari 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Yasmine ♥️ 6 years, 9 months ago

Google it

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Express thetrigometric ratio sin A, sec A and tan A in terms of cot A.

Posted by Jugal Singh Solanki 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Ram Kushwah 6 years, 9 months ago

cosec²A=Cot²A+1

sin²A=1/(Cot²A+1)----------(1)

sec²A=1+tan²A=1+1/cot²A

tanA=1/cotA

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If the sum of digits of a two digit number is 9 and the difference of those Digits is 3. What is the product of the digits of the same number.

Posted by Karan Singh 6 years, 9 months ago

CBSE > Class 10 > Mathematics

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Which is best - rs or rd ??

Posted by Aadrika Srivastava 6 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Nitin Kumar ✨✨?????✨✨ 6 years, 9 months ago

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Aarmaan Bedil 6 years, 9 months ago

Rd.............

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Aadrika Srivastava 6 years, 9 months ago

Tell me also

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Thanks and good night and HAPPY WALI Holi too??????to alll???????

Posted by Sanjana . 6 years, 9 months ago

CBSE > Class 10 > Mathematics

4 answers

Tejaswini Chhetri 6 years, 9 months ago

Ya happy holi and may god bless us with flying colors in our upcoming boards

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Puja Sahoo? 6 years, 9 months ago

Same 2 u

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Priyanshi Khandelwal 6 years, 9 months ago

Same to you sanjana ji

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Nitin Kumar ✨✨?????✨✨ 6 years, 9 months ago

Same 2 u

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You kabir come here

Posted by Isha Kapoor 6 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Isha Kapoor 6 years, 9 months ago

What

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Aarmaan Bedil 6 years, 9 months ago

You also ask a question..... ??

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Hello everyone anyone online

Posted by Isha Kapoor 6 years, 9 months ago

CBSE > Class 10 > Mathematics

5 answers

Puja Sahoo? 6 years, 9 months ago

Yep....

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Ruchi ?? 6 years, 9 months ago

Hlo..Isha ji

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Isha Kapoor 6 years, 9 months ago

Hello

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Rose? (Kannu?) 6 years, 9 months ago

Hello isha

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Nitin Kumar ✨✨?????✨✨ 6 years, 9 months ago

Yah!

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Express the HCF of 72 and 124 as a linear combination of 72 and 124

Posted by Gopika Vb 6 years, 9 months ago

CBSE > Class 10 > Mathematics

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Draw the graph of 2x-y-2=0,4x+3y-24=0 and y-4=0 find the area of triangle obtained

Posted by Viney Yadav 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 4 months ago

Given equations,
{tex}2 x - y - 2 = 0{/tex}
{tex}4x + 3y - 24 = 0{/tex}
{tex}y + 4 = 0{/tex}

We have, {tex}2x - y - 2 = 0{/tex} or {tex}x = {{y+2}\over2} {/tex}
When y = 0, we have {tex}x = {{0+2}\over2} = 1{/tex}
When x = 0, we have y = -2.
Thus, we obtain the following table giving coordinates of two point on the line represented by the equation {tex}2x - y - 2 = 0{/tex} and its graph is shown below.

x	1	0
y	0	-2

Now we have, {tex}\begin{array}{l}4x+3y-24=0\Rightarrow y=\frac{24-4x}3\\\end{array}{/tex}
When y = 0, we have x = 6
When x = 0, we have y = 8
Thus, we obtain the following table giving coordinates of two points on the line represented by the equation {tex}4x + 3y - 24 = 0{/tex} and its graph is shown below.

x	6	0
y	0	8

Also we have {tex}y + 4 = 0{/tex}
Clearly, y = - 4 for every value of x.
So, let E(2, -4) and F(0, -4) be two points on the line represented by y + 4 = 0. Plotting these points on the same graph and drawing a line passing through them, we obtain the graph of the line represented by the equation y + 4 = 0 as shown in Figure.

From Fig. we have {tex}\begin{array}{l}\bigtriangleup PQR\\\end{array}{/tex} having vertices P(3,4), Q(-1,-4) and R(9, -4).

Also, PM = 8 and QR = 10.
{tex}\therefore \quad \text { Area of } \triangle P Q R = \frac { 1 } { 2 } ( \text { Base } \times \text { Height } ){/tex}
{tex}\Rightarrow \quad \text { Area of } \triangle P Q R = \frac { 1 } { 2 } ( Q R \times P M ) = \frac { 1 } { 2 } ( 10 \times 8 )sq.\ units{/tex}
{tex}\Rightarrow \quad \text { Area of } \triangle P Q R = 40 \mathrm { sq } .units.{/tex}

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ANSWER

2-2=?

Posted by Hritik Kumar 6 years, 9 months ago

CBSE > Class 10 > Mathematics