given that f(x) = 3x + 4 and g(x) = square root of x, calculate gf(15)

Help PLEASE!

NEEDED BY THE 21ST OF JAN, 2013 AT 8PM. IT IS DUE THE NEXT DAY.
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1 Answer

f(x)=3x+4

g(x)=sq root

g(f(x))=sq root(3x+4)
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