ONLY MATHS EXPERTS AND MODERATORS TO ANSWER.
❌ DON'T SPAM❌
✅ REVELLANT ANSWERS ✅
✧ CLASS -9 -MATHS- CHAPTER 4
SPAM AND IRREVALENT ANSWERS WILL BE REPORTED
Answers
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
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.