# Math Help - profit

1. ## profit

The total profit from selling x units books is P(x) = (6x - 7) (9x - 8).
Find the marginal average profit function.

2. Originally Posted by ArmiAldi
The total profit from selling x units books is P(x) = (6x - 7) (9x - 8).
Find the marginal average profit function.
$MP(x)=\frac{d}{dx}P(x)$
when the sales are $x$