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Neha
Subject: Maths
, asked on 1/5/18
Solve this:
Q.8. Solve :
$\frac{1}{2\left(x+2y\right)}+\frac{5}{3\left(3x-2y\right)}=\frac{-3}{2}\phantom{\rule{0ex}{0ex}}\frac{{\displaystyle 5}}{{\displaystyle 4\left(x+2y\right)}}-\frac{{\displaystyle 3}}{{\displaystyle 5\left(3x-2y\right)}}=\frac{61}{60}$
$\left(x=\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.,y=5/4\right)$
Answer
1
Neha
Subject: Maths
, asked on 1/5/18
Answer 4th question
Q.4.
$\frac{5}{x-1}+\frac{1}{y-2}=2\phantom{\rule{0ex}{0ex}}\frac{{\displaystyle 6}}{{\displaystyle x-1}}-\frac{{\displaystyle 3}}{{\displaystyle y-2}}=1\left(x\ne 1andy\ne 2\right)\phantom{\rule{0ex}{0ex}}$
(solution, x = 4, y = 9)
Answer
1
Siya Hindwan
Subject: Maths
, asked on 30/4/18
Solve the Q5
Q.5. Solve : ax - ay = 2 & (a - 1) x + (a + 1) y = 2 (
${a}^{2}$
+ 1) by te method of substitution.
Answer
2
Shreya Kaul
Subject: Maths
, asked on 30/4/18
ax+b+by+a= a^2+b^2; x+y=2ab
Answer
1
Shreya Kaul
Subject: Maths
, asked on 30/4/18
A boat goes 30km
Answer
6
Siya Hindwan
Subject: Maths
, asked on 30/4/18
Answer the first question
Q1. Determine 'a' & 'b' for which the system of equations has infinite solution : – 2x – (a –4) y = 2 b + 1
4x – (a – 1) y = 5 b –1
Q2. Determine the value of k so that the following linear equations have no solution : (3k + 1) x + 3y –2 = 0
(k
^{2}
^{ }
+ 1) x + (k –2) y –5 =0
Answer
1
Neha
Subject: Maths
, asked on 29/4/18
Draw the graph of the following pair of linear equations in two variable graphically.
1) 2x-3y+13=0, 3x-2y+12=0
2) 2x-y=2, 4x-2y=4
3) 2x+3y=4, 4x+6y=12
Observation:
1) Graph of the pair of equation 1=________lines, Solution: ________
2) Graph of the pair of equation 2=________lines, Solution: ________
3) Graph of the pair of linear equation 3= ________lines, Solution: ________
Answer
2
Neha
Subject: Maths
, asked on 29/4/18
Solve this:
Q. Solve the following
$\frac{5}{x-1}+\frac{1}{y-2}=2\phantom{\rule{0ex}{0ex}}\frac{6}{x-1}-\frac{3}{y-2}=1$
Answer
1
Neha
Subject: Maths
, asked on 29/4/18
Solve this:
Q. If
$\alpha and\beta $
are the zeroes of the polynomial
$2{x}^{2}-7x+5$
find the value of
$\frac{{\alpha}^{2}+{\beta}^{2}}{\beta \alpha}$
Answer
2
Himanshu Sharma
Subject: Maths
, asked on 29/4/18
Pls answer
Answer
1
Riddhi M. Padia
Subject: Maths
, asked on 29/4/18
Meritnation, Please solve the question properly as soon as possible.
1. Solve the following pairs of linear equations by elimination method:
(i) 10 x+3 y=11,11 x+5 y=7.
(ii) 21 x +35 y=33, 49 x+70 y=67.
(iii) 6 x+5 y=11, 9 x+10 y =21.
(iv) 11 x+5 y=16,7 x+13 y=14.
Answer
2
Siddharth
Subject: Maths
, asked on 28/4/18
Why my question are not answered?pls tell
Answer
2
Aditya Vardhan
Subject: Maths
, asked on 27/4/18
Q. For what value of 'K' will the following pair of linear equations have infinitely many sol.
2x - 3y = 7(k + 1)x + (1 - 2k)y - 3 = 5k - 4
Answer
1
Neha
Subject: Maths
, asked on 24/4/18
Pls explain value of k ???:
1. Find the value of k for which the system of equations 2x +3y =8 and 3x -ky =4 is inconsistent.
2. If the sum of the zeroes of the quadratic polynomial kx
^{2}
-2x +3k is equal to their product, find the value of k.
Answer
2
Samartha Maheshwari
Subject: Maths
, asked on 24/4/18
In a town of 20,000 families, it was found that 40% families buy newspaper P, 25% families buy newspaper Q and 10% buy newspaper R, 5% families buy P and Q, 3% families buy Q and R, 5% buy P and R. If 1% of the families buy all three papers. Find the number of families which buy 1. P only 2. Q only 3. None of P ,Q R
Answer
1
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Q.8. Solve :

$\frac{1}{2\left(x+2y\right)}+\frac{5}{3\left(3x-2y\right)}=\frac{-3}{2}\phantom{\rule{0ex}{0ex}}\frac{{\displaystyle 5}}{{\displaystyle 4\left(x+2y\right)}}-\frac{{\displaystyle 3}}{{\displaystyle 5\left(3x-2y\right)}}=\frac{61}{60}$

$\left(x=\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.,y=5/4\right)$

Q.4. $\frac{5}{x-1}+\frac{1}{y-2}=2\phantom{\rule{0ex}{0ex}}\frac{{\displaystyle 6}}{{\displaystyle x-1}}-\frac{{\displaystyle 3}}{{\displaystyle y-2}}=1\left(x\ne 1andy\ne 2\right)\phantom{\rule{0ex}{0ex}}$

(solution, x = 4, y = 9)

Q.5. Solve : ax - ay = 2 & (a - 1) x + (a + 1) y = 2 (${a}^{2}$ + 1) by te method of substitution.

Q1. Determine 'a' & 'b' for which the system of equations has infinite solution : – 2x – (a –4) y = 2 b + 1

4x – (a – 1) y = 5 b –1

Q2. Determine the value of k so that the following linear equations have no solution : (3k + 1) x + 3y –2 = 0

(k

^{2}^{ }+ 1) x + (k –2) y –5 =01) 2x-3y+13=0, 3x-2y+12=0

2) 2x-y=2, 4x-2y=4

3) 2x+3y=4, 4x+6y=12

Observation:

1) Graph of the pair of equation 1=________lines, Solution: ________

2) Graph of the pair of equation 2=________lines, Solution: ________

3) Graph of the pair of linear equation 3= ________lines, Solution: ________

Q. Solve the following

$\frac{5}{x-1}+\frac{1}{y-2}=2\phantom{\rule{0ex}{0ex}}\frac{6}{x-1}-\frac{3}{y-2}=1$

Q. If $\alpha and\beta $ are the zeroes of the polynomial $2{x}^{2}-7x+5$ find the value of $\frac{{\alpha}^{2}+{\beta}^{2}}{\beta \alpha}$

1. Solve the following pairs of linear equations by elimination method:

(i) 10 x+3 y=11,11 x+5 y=7.

(ii) 21 x +35 y=33, 49 x+70 y=67.

(iii) 6 x+5 y=11, 9 x+10 y =21.

(iv) 11 x+5 y=16,7 x+13 y=14.

2x - 3y = 7(k + 1)x + (1 - 2k)y - 3 = 5k - 4

1. Find the value of k for which the system of equations 2x +3y =8 and 3x -ky =4 is inconsistent.

2. If the sum of the zeroes of the quadratic polynomial kx

^{2}-2x +3k is equal to their product, find the value of k.