решите пожалуйста.Брату и сестре вместе 19 лет.Брат старше сестры на 5 лет.Сколько лет каждому?

Какое окончание в слове ПЕРИФЕРИЯ и в АУДИТОРИИ?

Девочка массой 50 кг качается на качелях с длиной подвеса 4 м. С какой силой она давит на сиденье ри прохождении положения равновесия со скоростью 6м/с?Считать, что длина подвеса равна расстоянию от оси качелей до центра тяжести качелей с девочкой.

1) COMPLETE THIS EMAIL FROM mONICA TO HER FRIEND SARAH BY PUTTING IN SOMETHING, ANYTHING, ETC. IF THERE IS A WORD IN BRACKETS, ALSO USE THAT WORD.

Hi Sarah,

I`ve got something interesting to tell you but youmustn`t tell...(else) because its a secret. Clare has split up with Michael and she`s seeing....(new). His name`s Toby and she says he`s a builder, but she has not told me....(else) about him. That`s a surprise is not it? She did not say.......to me about problems with Michael before this happened and....(else) was expecting it to happen-we were all very surprised.

Well, apart from that,.......(else) is normal and.....(unusual) has happened since I last wrote to you. I have not been....(exciting) and I have not done.....(different) from the usual routine. .......... is quite boring in my life. I hope.....(good) happens soon.

Love to.........in your family

найти 3 последовательных четных натуральных числа. если утроенный квадрат второго из них на 72 больше удвоенного произведения первого и третьего