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8x+5y+=9：3x+2y=4

Posted by Arundhati Gulave 5 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 5 years, 7 months ago

By elimination method :

8x+5y = 9---------(1) ×2

3x+2y = 4 -----(2). ×5

we get,
16x+10y = 18
15x+10y= 20

subtracting both the equations we get;

x = -2

Putting the value of x in (1)...
8×-2 +5y = 9

-16+5y = 9

5y = 9+16

5y = 25

y = 25/5

y = 5

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When the results will come????

Posted by ?Royal Thakur? 5 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

S?R Ali 5 years, 7 months ago

In may end may be

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The cost of 3kg of apples and 6kg of grapes on a day was found to be Rs.90. After a month ,the cost of 1kg of apples and 2kg of grapes is Rs.40. Represent the situation algebrically and geometrically.

Posted by Chaitanya Tripathi 5 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

S?R Ali 5 years, 7 months ago

Let the cost of 1kg apple=x Rs Let the cost of 1 kg grapes =y Rs A.t.q. equation is 3x+6y=30 (eq.1) X+2y=40(eq.) From eq 1 3(x+2y=90)=x+2y=30(eq.3) X+2y=40 X+2y=30

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What is euclid division of lemma and algorithm

Posted by Anushka ? 5 years, 7 months ago

CBSE > Class 10 > Mathematics

3 answers

Yogita Ingle 5 years, 7 months ago

According to Euclid’s Division Lemma if we have two positive integers a and b, then there exist unique integers q and r which satisfies the condition a = bq + r where 0 ≤ r ≤ b.

The basis of the Euclidean division algorithm is Euclid’s division lemma. To calculate the Highest Common Factor (HCF) of two positive integers a and b we use Euclid’s division algorithm. HCF is the largest number which exactly divides two or more positive integers. By exactly we mean that on dividing both the integers a and b the remainder is zero.

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Arjun Kashyap 5 years, 7 months ago

I don't know

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Himalya Attri 5 years, 7 months ago

Nothing

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Factorize x sq. + 5x + 8

Posted by Aayush Sah 5 years, 7 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If alpha, bita are the zeros of the polynomial x^2+8x+6 frame a quadratic polynomial whose zeros are a)1/alpha, 1/bita b)1+1/bita, 1+alpha/bita

Posted by Affan Nadeem Khan 5 years, 7 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If A(1,2),B(-3,2)and C(3,-2) be the vertices of the triangle ABC, show that tanA=2.

Posted by Stranger?♋ Things 5 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 5 years, 7 months ago

The vertices of the triangle ΔABC are A (1, 2), B (- 3, 2) and C (3, - 2). The sides of the triangle are AB, BC, CA and we have to find the tangent ratio of the angle A.

The slope of the line AB is

m₁ = (2 - 2) / (- 3 - 1)

= 0 and

that of the line CA is

m₂ = (2 + 2) / (1 - 3)

= - 2

Then the angle A is determined from

tanA = (m₁ - m₂) / (1 + m₁m₂)

= (0 + 2) / (1 + 0)

= 2

Hence tanA = 2

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Use euclid's division algorithm to find the HCF of: 1) 252 and 660 2) 657 and 963 3) 388 and 1960 4) 1155 and 2145 5) 1309 and 1430

Posted by Akshat Shah 5 years, 7 months ago

CBSE > Class 10 > Mathematics

3 answers

Avinash Kumar 5 years, 7 months ago

252)660(2 504 156)252(1 156 96)156(1 96 60)96(1 60 36)60(1 36 24)36(1 24 12)24(2 24 00

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Avinash Kumar 5 years, 7 months ago

1)252 and 460 =12 2)657 and 963 =9 3)388 and 1960=4 4)1155 and 2145 =165

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Avinash Kumar 5 years, 7 months ago

1)252 and 660 =12

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The sum of 2 digits number and number by reversing the order of digits is 99. If the digits of the number differ by 3, find the number.

Posted by Divyanshi Tomar 5 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

Arun Singh 5 years, 7 months ago

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Prove that 5/√7 is irrational

Posted by Urvashi Varshney 5 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

Suraj Kumar 5 years, 7 months ago

Let 5/√7 is rational number Then,5/√7=x Or 5/x =√7......(1) Then 1/x (x is not equal to 0) is a rational number , because 1and x are quotient which are rational numbers Since from (1), rational number = irrational number , which is impossible Hence 5/√7 is not a rational number ,it is irrational number.

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Practice paper question number 1

Posted by Satender Verma 4 years, 10 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Write fundamental theorem of arthemetic

Posted by Diya Lalwani 5 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

Arjun Kashyap 5 years, 7 months ago

It states that every integer greater than 1[3] either is a prime number itself or can be represented as the product of prime numbers and that, moreover, this representation is unique, up to (except for) the order of the factors.

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1 + tan square theta by 1 + cos square theta is equal to 1 minus 10 theta by 1 - cos theta whole square is equal to 10 theta

Posted by Pravati Senapati 5 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

Ashish Kumar Jha 5 years, 7 months ago

Abhi yaha par nahi pohacha hai

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Ex14.2 question no. 13

Posted by Jasvir Kaur 5 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

S?R Ali 5 years, 7 months ago

Iska answer isi mai dekh lo

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Factorise 25x2+70xy+49y2

Posted by Vishal Gupta 5 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

Arjun Kashyap 5 years, 7 months ago

(5x+7y)²=0 => x=-7y/5

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Solve the following using equation by sublimation method 1x-3y-11=0 and 5x+y-7=0

Posted by Prerana Patil 5 years, 7 months ago

CBSE > Class 10 > Mathematics

2 answers

Yogita Ingle 5 years, 7 months ago

1x - 3y= 11 .......... (i)
5x+y= 7....... (ii)

Multiply equation (ii) by 3

15x + 3y = 21 ........... (iii)

Adding (i) and (iii), we get

16x = 32

x = 32/16 = 2

Put x = 2 in (i), we gwt

x - 3y = 11

2 - 3y = 11

-3y = 9

y = -3

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Nikhil Mehta 5 years, 7 months ago

x=2. y=-3

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3x +4y=10 and 2x - 2y=2

Posted by Pabitra Sahu 5 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

Sandli __Thakur_✍?✍? 5 years, 7 months ago

3x+4y=10→3x=10-4y → x=(10-4y)/3.......eq.1....similarly we find value of y by putting value if x which we find............so, 2x-2y=2→2[(10-4y)/3]-2y = 2→(now multiply2 by bracket) ,( 20-8y)/3=2+26→→20-8y = 6+6y→→ 20-6= 6y+8y→→ 14=14y→→ 14/14=y→→ 1 = y............hence y=1 .....now put value of y in eq1 ....x=[10-4(1)]/3→→ x=(10-4)/3→→x=6/3..→→x=2....,. Hence x=2 and y= 1 answer

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The area of circular path of uniform width (h) surroundings a circular region of radius (r) is_

Posted by Jeewachh Yadav Jeewachh Yadav 5 years, 7 months ago

CBSE > Class 10 > Mathematics