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Answered by ayushsenapati7
1

Answer:

1. let cost of notebook be X (given)

let cost of pen be Y

given, ₹X=₹2Y

2. 1) 2x + 3y +(-9.35....)=0, a= 2,b=3,c= -9.355...

2) already in linear equation, a=1,b=-1/5,c= -10

3) -2x+3y-6=0, a is -2, b is 3 and c is -6

4) x-3y+0=0, a is 1, b is -3 and c is 0

5)2x-5y+0=0, a is 2, b is -5 c is 0

6) 3x+2+0=0, a is 3 b is 2 and c is 0

7) 0x+y-2=0, a is 0 b is 1 c is -2

8) 2x+0y-5=0, a is y b is 0 and c is -5

please select my answer as brainliest and thank me

I am no intelligent just from 10th class

ALB

Answered by tennetiraj86
2

Step-by-step explanation:

Solutions:-

1)

Let the cost of a pen be Rs. Y

Let the cost of a note book be Rs. X

Given that

The cost of a note book

= twice the cost of the pen

= Rs. 2Y

X = 2Y

=> X-2Y = 0

This is the linear equation in two variables .

2)

I) Given equation is 2x+3y = 9.35bar

=> 2x+3y-9.35bar = 0

On Comparing this with ax+by+c = 0

a = 2 ,b=3 ,c = 9.35 bar

ii) Given equation is x - y/5 -10=0

=> (5x-y-50)/5 = 0

=> 5x-y-50 = 0

=> 5x+(-1)y+(-50)=0

On Comparing this with ax+by+c = 0

a =5 ,b-1 ,c = -50

iii)Given equation is -2x+3y = 6

=> -2x+3y -6 = 0

=> -(2x-3y+6) = 0

=> 2x-3y+6 = 0

On Comparing this with ax+by+c = 0

a = 2 ,b=-3 ,c =6

iv)Given equation is x=3y

=> x-3y= 0

=>(1)x+(-3)y+0 = 0

On Comparing this with ax+by+c = 0

a =1 ,b=-3 ,c = 0

v) Given equation is 2x = -5y

=> 2x+5y= 0

=>2x+5y+0 = 0

On Comparing this with ax+by+c = 0

a = 2 ,b=5 ,c =0

vi) Given equation is 3x+2 = 0

=> 3x+0y+2=0

On Comparing this with ax+by+c = 0

a = 3,b=0 ,c =2

vii) Given equation is y-2 = 0

=> 0x+y-2=0

On Comparing this with ax+by+c = 0

a = 0,b=1 ,c =-2

viii)

Given equation is 5=2x

=> 2x-5=0

=> 2x+0y-5 = 0

On Comparing this with ax+by+c = 0

a = 2 ,b=0 ,c =-5

Used formulae:-

  • A linear equation has two variables in it is called a linear equation in two variables.

  • The general form of a linear equation in two variables is ax+by+c = 0

  • It has infinitely number of many solutions.

  • The graph of it is a straight line.

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