Question

for uttarakhand flood victims two sections A and B of class 10 contributed Rs.1500. if the contribution of class 10 A was less than that of class 10 B ,find graphically the amounts contributed by both the sections.

Answer 1

Equations:
First, let's take contribution of class "a" to be "a" only and contribution of class "b" to be "b" only.

Contribution of       a+b=1500       (1)
Contribution of       a=b-100          (2)

Substituting 1 in 2 we get,

a+b=1500
b-100+b= 1500

rearranging,

b+b-100= 1500

2b-100=1500

2b=1500+100

2b=1600

b=1600/2

b=800    (3)

Now, we have contribution of class "b"

Substituting 3 in 1,

a+b = 1500

a+800 = 1500

a = 1500-800

a = 700

Therefore, we now have contributions of class a and b. We can now draw the graph as follows:

Using equation (1) we can assume any random "x axis" value to find the corresponding "y axis" value 
( Tip: keep these random values as close to the answer we found before as possible)

If "a"= 600,
600+b=1500
b=1500-600
b=900.

If  a= 800
a+b=1500
800+b= 1500
b=1500-800
b=700.

Section "a"  x axis  :  600     700     800 
Section "b"  y axis  :  900     800     700

Please try to do the graph on your own.

Answer 2

Q) *For uttarakhand flood victims two sections A and B of class 10 contributed Rs.1500. if the contribution of class 10 A was less than that of class 10 B ,find graphically the amounts contributed by both the sections.*

Answer:-

Answer:- Let the contribution of X-A be 'a' and the contribution of X-B be 'b' only .

given:

a+b=1500 ------------->(1)

contribution of 'a' is rs.100 less than 'b'

so: a-100=b (or) a=b+100

a=b+100 ----------------->(2)

FROM EQUA (1) AND (2)....

a + b =1500--------->(1)

a =b+100 ------------>(2)

arranging equa 2 ..such that to subtract it ..so ,it becomes:-

:. a-b=100

subtracting the equations:-

a + b = 1500

b = 1500 (-) a - (+)b = (-) 100

-----------------------------------------------

2a + 0 = 1400

-----------------------------------------------

:. 2a=1400

a=1400/2

a=700

SUBSTITUTING THE VALUE OF 'a' IN ANY ONE OF THE EQUATION.....{i substituted in equation (1)}

a + b = 1500

700 + b = 1500

b = 1500-700

b=800

:. THE VALUE OF a is 700 and VALUE OF b is 800

hope it helps you

its the correct answer ...

do mark me the BRAINLIEST if it helps you

stay safe stay healthy.....

regards ...from your helpmate