Question

va rog frumos am nevoie de ajutor.. nu mai tin minte absolut nimic! dau coroana​

Answer 1

Răspuns:

Explicație pas cu pas:

Answer 2

$\it 2)\\ \\ \ a)\ \ m_a=\dfrac{9+39+96}{3}=3+13+32=48\\ \\ \\ b)\ \ \mathcal{P}=4\cdot \ell=4\cdot15=60\ cm\\ \\ \\ 6)\\ \\ 3^{n+1}=81 \Rightarrow 3^{n+1}=3^4 \Rightarrow n+1=4 \Rightarrow n=3$

$\it 7)\\ \\ 2,5x-1,5=3,5\Big|_{+1,5} \Rightarrow 2,5x=5\Big|_{\cdot2} \Rightarrow5x=10\Big|_{:5} \Rightarrow x=2$