f(5) = 4(5) - 11
f(5) = 20 - 11
f(5) = 9
The answer is 9 :)
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By assigning the value of X to the function, we have:
f( x ) = 4 x - 11
f ( 5 ) = 4 * 5 - 11
f ( 5 ) = 20 - 11
f(5 ) = 9
therefore f ( 5 ) = 9
