David cut a board 20 foot long into four equal pieces. Which expression does NOT equal the length of one of the pieces in feet?
2 answers:
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Answer: f ° g (x) = x
Step-by-step explanation:
f(x) = 3x - 5
g(x) =
fg implies :
f ( )
What we have done is just to put in the value of g(x). The next thing is that we will substitute ( ) for the value of x in f(x) , that is
fg(x) =3 ( ) - 5
fg(x) = x + 5 - 5
fg(x) = x