6n +3 = 2
6n = 2-3
6n = -1
n = -1/6
Seven adult tickets and eight kids tickets
1.6333
The 3 goes on forever so I recommend rounding up.
Angle between two vectors = arc cos [(u.v)/(abs(u) x abs (v))]
u.v = (10 x 9) + (6 x 5) = 90 + 30 = 120
abs (u) =

abs (v) =

Angle between the two vectors = arc cos [120 / (11.66 x 10.30)] = arc cos [120 / 120.1] = arc cos [1] = 0
Since the angle between the two vectors is 0,
therefore, the angles are parallel
I write 2,3..............