1) 2) 3)
X+187/11=21 <u>581</u> = <u>51 </u> Х+8=<u>1440</u>
X+17=21 83 Х 15
X=21-17 7= 51/Х Х+8=96
X=4 7Х=51 Х=96-8
Ответ:4 Х=51:7 Х=88
Х=7 2/7
Ответ: 7 2/7 Ответ: 88
3a-2b = 3*(0,4,-7) - 2*(7,-9,1)=(0,12,-21)-(14,-18,2) = (-14,30,-23)
-a+4b = (0,-4,7) + (28,-36,4) = (28,-40,11)
S=a+b/2*h S/h*2-b=65/13*2-3=7
P=0.8*0.3*0.4 +0.7*0.2*0.4+0.6*0.2*0.3=0.188
P=1-0.2*0.3*0.4= 0.976