No exponent can make the base number negative, so the domain is x > 0
Probably you are supposed to compute

Factorize the numerator and denominator, then simplify:
Answer:
Step-by-step explanation:
k/9=10/3 multiply both sides by 9
k=90/3
k=30
Answer:
That's the symbol for pi
Step-by-step explanation:
16x+2x-2=0
18x-2=0
18x=2
x=9
( will be your finilly answer) But not sure