SOLUTION: Find the domain of f(x)=7+ sqrt 3x+21 and express it using interval notation. How do I solve this?

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Question 71927: Find the domain of f(x)=7+ sqrt 3x+21 and express it using interval notation. How do I solve this?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
domain of f(x)=7+ sqrt (3x+21) and express it using interval notation
DOMAIN: Because of the sqrt, 3x+21 must be >=0
3x+21>=0
3x>=-21
x>=-7
Interval notation (-7,inf)
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Cheers,
Stan H.