Answer:
B?
Step-by-step explanation:
my best guess! it is the best!
2 buses, 5 vans.....
a = 2 + 3a + 8
a = 10 + 3a
a - 3a = 10
-2a = 10
a = -5
x=100
log10 x=2
10^2=x
100=x