Question

calculeaza media aritmetica. 13 si 15. 4 si 8. 2 si 20. 143 si 13. 57 si 49. 99 si 37

Answer 1

(13+15):2=14
(4+8):2=6
(2+20):2=11
(143+13):2=78
(57+49):2=53
(99+37):2=68
Sper ca te-am ajutat...Cu placere!!!

Answer 2

Pai.. Media aritmetica e $\frac{a+b}{2}$\. Deci:
-$\frac{13+15}{2}= \frac{28}{2} =14$;
-$\frac{4+8}{2}= \frac{12}{2}=6$;
-$\frac{2+20}{2} = \frac{22}{2}=11$;
-$\frac{143+1}{2}= \frac{144}{2} =72$;
-$\frac{57+49}{2} = \frac{106}{2} =53$;
-$\frac{99+37}{2}= \frac{136}{2}=68$. Sper ca ai inteles si sper ca te-am ajutat! :D