Answer:
x ≤ 2
Step-by-step explanation:
3rd
I think thats how u fill it
A and C
5) logx+log(x+9)=2
log(x(x+9))=2, log(x^2+9x)=2
6) log(x^2+9x)=2
(x^2+9x)=36 or 6^2