Question

media aritmetica a 2 fr zecimale este 30.54 ia una dintre fr este 20.23.Aflati cealalta fr

Answer 1

S = Ma x 2 = 30.54 x 2 = 61.08
b = Ma - a = 61.08 - 20.23 = 40.85 = 4085/100 = 817/20

Answer 2

$\frac{a+b}{2} =30,54 =\ \textgreater \ a+b=30,54*2=\ \textgreater \ a+b=61,08\\ \\ b=20,23 \\ \\ a+20,23=61,08=\ \textgreater \ a=61,08-20,23=\ \textgreater \ a=40,85$