1% = 7 человек
100% = 700человек
Решение
100 : 1 = 100 ( процентов )
100 * 7 =700 (болельщиков )
1) 4
2) 4
3) 3
4) 4
5) 4
6) 2
7) 2
8) 7
9) 5
10) 4
11) 4
12)
8/5 *х²-20/9 *х+72/25 *х-4=7/3 *х²-50/9 *х +42/25 *х-4
8/5 *х²-20/9 *х+72/25 *х=7/3 *х²-50/9 *х +42/25 *х
8/5 *х²+148/225 *х=7/3 *х²-872/225 *х
8/5 *х²+148/225 *х-7/3 *х²+872/225 *х=0
-11/15 *х²+68/15 *х=0
-1/15 *х*(11х-68)=0
х(11х-68)=0
х=0 11х-68=0
11х=68
х= 6 8/11
Ответ: х1=0
х2=6 8/11
√50(cos²(3π/8)) - √50(sin²(3π/8)) = √50(cos²(3π/8) - sin²(3π/8)) = √50(cos(2 × (3π/8))) = 5√2(cos(3π/4)) = 5√2 × (-√2/2) = -(5 × 2)/2 = -5