Answer:
0
Step-by-step explanation:
25+x=25x
25-25=0
y=0
Step-by-step explanation:
Length of arc of a circle is given as:

Thus, the measure of central angle is 140°.
If you would like to know what is the unit price for the hair shampoo, you can calculate this using the following steps:
500 ml ... $2.10
100 ml ...$x = ?
500 * x = 2.10 * 100 /500
x = 2.10 * 100 / 500
x = $0.42
The unit price for the hair shampoo is $0.42.