I think its B. Please check my answer. Thanks!
School A 1v + 10b = 300
School B 4v + 5b = 185 Multiply second equation by -2 and add to equation 1 to get
-7v = -70
v = 10
Sustitute this value in for v in either one of the equations to find b
10 + 10b = 300
10 b = 290
b = 29
+36916 
