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.
Paralel lines have same slope
if green line is paralell to red line
and the slope of the green line is 1/4
slope of red line is 1/4 also
260 because the tens position is the far right one before the decimal, and the number is above 5.
