The answerrr is 18 for thisvprblme
I would argue that it does due to that if it increased, it's either from a 30% chance that nothing changed or that the teachers did it. Since 100-30=70, there's a 70 percent chance that the teaching effect did work!
15 + 4(h) = 27
27 - 15 = 12
12/4 = 12
Margie can rent the bicycle for 4 hours.
The answer is down below following the order 6~9
6. A
7. C
8.C
9. D