360 г. = 30\%, 360/30=12=1\%, 12*100\%=1200 (всього) 1200-360=840г.
Гипотенуза = 18.5 * 2 = 37
Теорема косинусов
37^2 = (12^2 + a^2) - 2*12*a * cos 90
cos 90 = 1
37^2 = 12^2 + a^2
a^2 = 37^2 - 12^2 = 1369 - 144 = 1225
a = √1225 = 35
Ответ: 35
I3-1.5xI=2.5
3-1.5x₁=2.5
1.5x₁=0.5
x₁=1/3
3-1.5x₂=-2.5
1.5x₂=5.5
x₂=2 2/3
Ix-1 5/6xI=2
I-5/6xI=2
-5/6x₁=2
x=-2.4
-5/6x₂=-2
x₂=2.4