Question

Evaluate the function f(x)=7x+1 at the given values of the independent variable and simplify.
f(3)=
f(x+4)=
f(-x)=

Answer 1

hint:
\[f\left( 3 \right) = \left( {7 \times 3} \right) + 1 = ...?\]

Answer 2

I replaced x with 3