24mn - 3m + 40n – 5, если m = -$$2\frac{2}{3}$$, n = 0,2.
$$ m = -\frac{8}{3} $$
24 * (-$$\frac{8}{3}$$) * 0.2 - 3 * (-$$\frac{8}{3}$$) + 40 * 0.2 - 5 = -$$ \frac{24 * 8 * 0.2}{3} $$ + $$ \frac{24}{3} $$ + 8 - 5 = -$$ \frac{38.4}{3} $$ + 8 + 3 = -12.8 + 11 = -1.8
Ответ: -1,8