1) 10.2 × 3.5 =35.7
2) 10.2× 23.5 = 239.7
3) 35.7-239.7= - 204
3x(2x-1)-2(3x+4)
6x-3x-6x-8
-3x-8
-3x=8
x=2,6
А) cos210° = cos(180° + 30°) = -cos(30°) = -√3/3
B) sin112°cos22° - sin22°cos112° = sin(112° - 22°) = sin(90°) = 1
Ответы: А) -√3/3; В)1
1) s1 / s2 = 1,5 * t2 * v1 / t2 * 2 * v1;
2) s1 / s2 = 1,5 / 2;
3) s1 / s2 = 3/4.
Ответ: 3/4.