См фото __________________________________________________
5-3n-(<span><span>3n+4+ 8n+7)</span>< 15
-3n-3n-8b<15-5+4+7
-14n<21
14n>-21
n>-1.5
n(-1.5;+∞)
</span>
7,027•23,2+0,973•23,2+8•76,8 =
= 23,2 · (7,027+0,973) + 8•76,8 =
= 23,2 · 8 + 8•76,8 =
= 8 · (23,2 + 76,8) =
= 8 · 100 = 800
Ответ: 800.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!