10, 20w, 2w, and we are factors of 20w and 40wz
25/12.5 = 40/y
cross multiply
(25)(y) = (12.5)(40)
25y = 500
y = 500/25
y = 20 <====
The average speed = (speed 1 + speed 2)/2
the average speed = (80/10 + 100/20)/2
the average speed = (8 + 5)/2
the average speed = 13/2
the average speed = 6.5 km/minute
Angle A = 45, it’s opposite angle is 45
It’s adjacent is 135 degrees for total of 180 on each parallel line