(4.2*0.1+0.8*1)*6+3*(2.6*0.1+0.3*1)=9 1)4.2*0.1=0.42 2)0.8*1=0.8 3)0.42+0.8=1.22 4)1.22*6=7.32 5)2.6*0.1=0.26 6)0.3*1=0.3 7)0.26+0.3=0.56 8)3*0.56=1.68 9)7.32+1.68=9 ОТВЕТ:9