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

0 votes

Help PLEASE!

composite-functions

asked Dec 6, 2013 in PRECALCULUS by mathgirl Apprentice

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1 Answer

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Given f(x) = 3x+4

g(x) = √x

g(f(15)) = g(3*15+4)

= g(45+4)

= g(49)

= √49

g(f(15)) = 7

answered Dec 10, 2013 by william Mentor

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