Question

11 si 12 va roooog!!!!!!!!!!

Answer 1

11. a+b+c=31,23

a=b-7,29=>b=a+7,29

a=c/5=>c=5a

a+a+7,29+5a=31,23

7a+7,29=31,23

7a=31,23-7,29

7a=23,94=>a=23,94:7=>a=3,42

b=a+7,29=>b=3,42+7,29=>b=10.71

c=5a=>c=5 ori 3,42=>c=17,1

12. (6km+10km)/(1h+1h)=16hm/2h=8km/h

nu sunt sigura..asa am gasit formula aici