Решение методом подстановки. <span><span>{<span><span>−16x+3y=−45</span><span>14x+46y=88</span></span></span>⇒</span><span><span>{<span><span>y=<span>163</span>x−15</span><span>14x+46y=88</span></span></span>⇒</span><span><span>{<span><span>y=<span>163</span>x−15</span><span>14x+46<span>(<span><span>163</span>x−15</span>)</span>=88</span></span></span>⇒</span><span><span>{<span><span>y=<span>163</span>x−15</span><span><span>7783</span>x−778=0</span></span></span>⇒</span><span><span>{<span><span>y=<span>163</span>x−15</span><span>x=3</span></span></span>⇒</span><span>{<span><span>y=1</span><span>x=3</span></span></span>
Ответ: <span>(<span>3;1</span><span>)</span></span>
Всего 10 секторов. Стрелка выпадет на один. Значит, один к десяти
sin2x = 2sinx*cosx ; cosx*tgx = sinx ; sin^2x*cos^2x=1
16.9²-16.9*3.7-16.9*3.2
16.9(16.9-3.7-3.2)
16.9*(16.9-6.9)
16.9*10
169
Otvet:169