Respuesta :
B=3 Please vote me as brainliest if you think i helped and i attached a photo with work as well :) Have a great day

B=3
Since L1 perpendicular on L2
So, slope of L1 X slope of L2=-1
Slope of L1= -4/3
So, slope of l2 =3/4
So, 6-B=3
So B= 6-3=3
Since L1 perpendicular on L2
So, slope of L1 X slope of L2=-1
Slope of L1= -4/3
So, slope of l2 =3/4
So, 6-B=3
So B= 6-3=3