In the figure below, if line r is parallel to line s, m

Answer: [tex]26^{\circ}[/tex]
Step-by-step explanation:
By the alternate exterior angles theorem,
[tex]3x+5=5x-9\\\\5=2x-9\\\\2x=14\\\\x=7[/tex]
This means that [tex]m\angle B=5(7)-9=\boxed{26^{\circ}}[/tex]