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What is the value of f(5) for the function f(x) = 3x - 4?

1 Answer

Mar 18, 2018

See a solution process below:

Explanation:

To find #f(5)# substitute #color(red)(5)# for each occurrence of #color(red)(x)# in #f(x)#:

#f(color(red)(x)) = 3color(red)(x) - 4# becomes:

#f(color(red)(5)) = (3 xx color(red)(5)) - 4#

#f(color(red)(5)) = 15 - 4#

#f(color(red)(5)) = 11#

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