√2 (√3+√18) - 2⁻¹ *√24 =
=√2 * √3 + √2 *√18 - ¹/₂ * √(4*6) =
= √6 + √36 - ¹/₂ * 2√6 =
= √6 + 6 - √6 = 6
1) 11/4 : 11 = 11/4 * 1/11 = 1/4
2) 1101/50 : 6 = 1101/50 * 1/6 = 1101/300
3) 53,77/19 = 2,83
4) 1/4 + 1101/300 = 2352/600 = 1176/300
5) 1176/300 - 283/100 = 327/300 = 1 целая 9/100
S(площадь)=21*14=294м.
Р (периметр)=21+21+14+14=70м.
5х+7=18+34
5х=52-7
5х=45
х=45:5
х=9