Question

Plz Solve these questions guys i will be vry thankful to you that's really vry imp to solve these ques. If u help me then I also try to help u if possible Thnk you..

Answer 1

(2) 5x-4y+8=0 ; 7x+6y-9=0

a1=5 b1=-4 c1=8

a2=7. b2=6. c2=-9

a1/a2=5/7

b1/b2=-4/6 =-2/3

c1/c2=8/-9

since, a1/a2≠b1/b2

hence, the line intersect at one point.
having only one solution.

(3) 2x+3y=11 .........i
2x-4y=-24.......ii

sub ii from i

2x+3y-(2x-4y)=11-(-24)
2x+3y-2x+4y=11+24
7y=35
y=5

putting value of y in equation i
we get,

2x+3y=11
2x+3×5=11
2x+15=11
2x=11-15
2x=-4
x=-2

put the value of x & y in equation
y=mx+3
5=m×(-2)+3
5=-2m+3
5-3=-2m
2=-2m
-1=m

question 4 is like question 2.

(5).Let the cost of 1 kg of apple be x
& 1 kg of grapes be y.

2x+y=160....i
4x+2y=300
2x+y=150....ii
( show this on graph by putting value of x in equation)

@Altaf

Answer 2

Answer:

hope it helps u and pls mark as brainliest mate I am