Answer:
C x >=0
Step-by-step explanation:
Each term has to be defined
sqrt(5x) >= 0
Square each side
5x >=0
Divide by 5
5x/5 >=0/5
x >=0
sqrt(x+4) >=0
Square each side
x+4 >0=
Subtract 4 from each side
x+4-4 >=0-4
x >=0-4
The first is more restrictive so we use that
x>=0
