Срешением .на музыкальном конкурсе выступают пианисты-по одному от каждого из заявленных городов,в том числе и краснодара,омска,челябинска и екатеринбурга.порядок выступлений определяется жребием.какова вероятность того,что пианисты из челябинска и нкатеринбурга будут выступать раньше пианистов из
краснодара и омска? ответ округлите до тысячных
х га - в первый день
7/9 х га - во второй
х+7/9 х=240
1 7/9 х =240
х= 240:1 7/9=240 * 9/16
х=270/2=135 (га)-вспахали в первый день
240-135=105(га)-во второй
2.
1) 1 4/5 : 3/4=9/5 * 4/3=12/5=2 2/5(т.руб./кг)-стоимость конфет
2) 2 1/2 * 2 2/5=5/2 * 12/5=6(т.руб.)-заплатят за 2 1/2 кг
3.
1/6 х+5/12 х=8 4/10
2/12 х+5/12 х=8 2/5
7/12 х= 8 2/5
х= 8 2/5 : 7/12=42/5 * 12/7
х=72/5=14 2/5
4.
5/9+mn=(5+9mn)/9
5.
5 2/3 : 1/3 - 1 7/12 * 2=13 5/6
1) 5 2/3 : 1/3=17/3 * 3/1=17
2) 1 7/12 * 2=19/12 * 2=19/6=3 1/6
3) 17-3 1/6=16 6/6 - 3 1/6=13 5/6
I live in a comfortable city flat in a 9-stored block of flats not far from the centre of Samara. It is not a very green place, but still there are many trees around the house and in summer the yard looks very beautiful and cozy. The house is located comfortably because there a few supermarkets, pharmacies around and a cinema.My flat is on the fourth floor. It’s very comfortable and well-planned. There are three rooms, a kitchen, a bathroom and a balcony overlooking the yard.We have all modern conveniences, such as central heating, electricity, cold and hot running water and a telephone. The largest room in our flat is the living room. My family uses it as a sitting room. There is a sofa, two armchairs, a small glass coffee table, a TV set on the wall and a DVD player in it. We use this room to meet the guests and to celebrate all holidays and important family occasions.Two other rooms are a bedroom of my parents and my bedroom. My room is rather small but it is very cozy. I like it so much, because this is my own place, my own corner.I have all the things that I need there – a soft bed at the right corner, a table near the window with a computer and a wardrobe near the wall.Our kitchen is not very large but it’s light. It’s very well-equipped. We have got a refrigerator, a microwave oven, an electric teapot, a coffee maker and a toaster and a lot of other household stuff. My mum likes cooking very much and in the evenings my family likes having dinner together in the kitchen – it’s our family tradition