Answer:
216
Step-by-step explanation:
area of one side-6x6=36. 36x6=216
It's 20.
12/x=3/5
Then cross multiply 12*5 and 3*x
3x/3=60/3
x=20.
-8 I think on a graph right
Y=3x+3
Gradient = : = : = : = 3
Y= mx + c
y = 3x + c
Insert x and y values for first point(4,15)
15 = 3 (4) + c
15 = 12 + c
3 = c
Y=3x +3