Answer:
Trees.
Step-by-step explanation:
The houses look sturdy, and not that flammable. The trees and grass are very plentiful, so they would spread easily.
Please clarify if this wasn't what you were asking.
Answer:

Step-by-step explanation:

4

This is because there is an imaginary 1 in front of the first sqrt.
Answer:
W÷9=z
Step-by-step explanation:
18÷9=2
45÷9=5
81÷9=9
Z is the quotient of W when divided by 9.
4n+8=2(n+6)
Now isolate the n on one side of the equation:
4n+8=2n+12(distribution of the 2)
4n=2n+4(combine like terms)
2n=4(combine like variables)
N=2(isolate the n)
The answer is 2
Good luck!