Question

Am nevoie la amandoua pronlemele!!!Va roggg!!!

Answer 1

7. notam  x laturile egale si y cealalta latura

2x+y=160m

cazul 1. x=60m => 2·60m+y=160m

               y=160m-120m

               y=40m,  deci laturile sunt : 60m, 60m, 40m

cazul 2. y=60m => 2x+60m=160m

2x=160m-60m

x=100m:2

x=50m,  deci laturile sunt : 50m, 50m, 60m

 

8. primul mod: aflam cat are o latura apoi inmultim cu 4

16:2=8m are o latura

gardul are 8m·4=32m

al 2-lea mod: daca 2 laturi au 16m=> 4 laturi au dublu

gardul are 2·16m=32m