Question

f(x)=7x+9 find f(6c-4)

a.35c+9 b.42c+9

c.42c-19 d.42c-19

Answer 1

C & D Answer Choices Are The Same, Your Answer Is 42c-19

$f(x) = \: all \: x \: in \: (7x + 9)$
$f(x) = 7x + 9$
$f(6c - 4) = 7x + 9$
*Distributive Property
$f(6c - 4) = 7(6c - 4) + 9$
$f(6c - 4) = 42c - 28 + 9$
$f(6c - 4) = 42c - 19$