Решите уравнение: 5х2 – 3х – 2 = 0

Read the text. Use the word given in brackets to form the word that fits in the space. Внимание!!! Используйте слово данное в скобках, чтобы заполнить правильно пропуск. The Bald Eagle In 1782, soon after the United States won its independence, the bald eagle (CHOOSE) as the national bird of the new country. American leaders wanted the eagle to be a symbol of their country because it is one of the (STRONG) birds. In 1972 there (BE) only 3,000 bald eagles in the entire United States. Today the bald eagle (NOT DISAPPEAR) yet but it is in danger. The reason for the bird's decreasing population was (POLLUTE) of rivers by pesticides. Pesticides poison the fish. Eagles eat these fish and then the eggs eagles lay have very thin shells and do not hatch. Today, the American government and the American people (TRY) to protect the bald eagle. We are sure that the American national bird (STAY) a symbol of strength and courage for many years to come.

вычислите: 3 целых 1/2 + 2 целых 2/9 б)3/10 + 9/10 в) 7-1 целая 5/9 г) 2 целых 1/2 - 4/5 выразите в километрах 2 км 200м решите задачу:одну и туже работу один студент выполнил за 4 дня,другой-за 5 дней . Какую часть работы выполняет студенты за 1 день,работая вместе?