Question

w \: - 2 \: +8w \\ w = 0.4" alt="4w \: - 2 \: +8w \\ w = 0.4" align="absmiddle" class="latex-formula">

Answer 1

$4w - 2 + 8w$
$= 12w - 2$
$when \: x = .4$
$= 12(.4) - 2$
$= 4.8 - 2$
$= 2.8$