Given the points A(3, 1), B(6, y) and C(12, -2) find the value(s) of y if… (a) The distance AB is 5
(b) The lines AB and BC are perpendicular

[Level - GCSE]
Worth 20 points
I’ll give brainliest if I figure out to use it.

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?