Question

Ex 2 ,urgent va rog! Vreau si rezolvarea nu doar raspunsurile ! Dau 99 pct !

Answer 1

           AB             BC            AE            CF              A
a)          8              10             5               4                40
explicatii
A=AB×AE=8×5=40
A=BC×CF=BC×4=40    BC= 40:4=10

b)        12              10,5         7                  8             84
explicatii
A=AB×AE=12×AE=84       AE=84:12=7
A=BC×CF=10,5×CF=84    CF= 84:10,5=8

c)        3,(23)            1,6         0,3               0,(60)            0,(96)
explicatii
0,(96)=96/99=32/33
0,3=3/10
1,6=16/10=8/5
A=AB×AE=AB×0,3=32/33       AB=32/33: 3/10=32/33×10/3=320/99=3,(23)
A=BC×CF=8/5×CF=32/33      CF= 32/33:8/5=32/33×5/8=20/33=0,(60)