Answer:

Step-by-step explanation:
Refer the attached figure .
We are given a line AB
Point A
Point B
Formula for slope 'm' when two points are given :

Substituting thew values


Since we are given that AB is perpendicular to BC
So, By property - perpendicular slopes are negative reciprocals of each other.



So, Slope for line BC : 
Point B = (4,4)
Formula of equation of line : 





Hence the equation of line BC : 
Answer:
-12
Step-by-step explanation:
Answer: 240
Step-by-step explanation:
144/3 = 48
5x48= 240
Inverse property of multiplication.