SOLUTION: given functions f(x)=x^+4;g(x)=square root of 7-x find (f0g)& (g0f)& domains for each??

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Question 972152: given functions f(x)=x^+4;g(x)=square root of 7-x
find (f0g)& (g0f)& domains for each??

Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
x^2+4
Domain, all reals; x can be anything.
Range y≥4
f(0)=4

sqrt(7-x)
x must be ≤7 (-infinity,7]
y≥0
g(0)=sqrt(7)
graph%28300%2C300%2C-10%2C10%2C-10%2C10%2Cx%5E2%2B4%2Csqrt%287-x%29%29