На верхней полке в буфете стоят 4 чашки, на средней полке 6 чашек, а на нижней столько, сколько на верхней и нижней вместе. Сколько чашек на нижней полке?

Use the right prefixes to form suitable words: 1. A lot of european countries are ... (dependent) 2. People who speak two languages equally well are called ... (lingual) 3. Snail mail is ... (efficient) compared to electronic mail. 4. A lot of ...(appearing) languages are being replaced by english. 5. There was a big...(complete) to take part in this concert. 6. ...(globalisation) budinesses often have their offieces in different parts of the world. 7. we are proud of our amazing ...(achieve) in nuclear physics. 8. a ...( wealth) bussinessman bought this house for five million dollars.

задача тане на приобретение школьных принадлежностей дали 1000 р. на тетради она истратила 1/5 этой суммы, а на учебники 3/4 остатка. сколько рублей осталось?