Answer:
The distance is 20km
Step-by-step explanation:
Given
[tex]y = 20 - 12x[/tex]
Required
The distance between [tex]the\ library\ and\ the[/tex] school
The function represents the distance [tex]y = 20 - 12x[/tex]
So, when x = 0.
This implies that he has not started moving.
So:
[tex]y = 20 - 12 * 0[/tex]
[tex]y = 20 - 0[/tex]
[tex]y = 20[/tex]