If you put 140 rail of water in a glass, how much concentrate should be added?
Lemon Squash;
1 part concentrate
to 2 parts water

70ml

Step-by-step explanation:

Key:

1.concentrate - c

2.water - w

if 2w   = 1 c

140w = 140w x 1c

                   2w

=70c

= 70 ml of concentrate.

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.

its c