На сколько градусов Земля поворачивается вокруг своей оси за 1 час, за 4 минуты?

найти область определения функции у= под корнем 18-9х-2х а квадрате помогите решать

план рассказа В.В.Бианки "по следам".

VI. Раскройте скобки я употребите глаголы в соответствующей форме. 1. They (to discuss) the terms of payment for two hours before they came to conclusion. 2. If your partner (to adhere) to the terms of the contract you can't (to terminate) it 3.1 (to be sorry) to inform you but you will have to pay penalty since you (to violate) clauses 4 and 5 of our contract 4. The validity of the contract (not to be recognized) since it was not concluded in writing. 5. Unfortunately the quality of the equipment (not to meet) the requirements of Green and Co.: and they refused to deal with the manufacturer. 6. Which of you (to be aufhrized) to sign the agreement? 7. He wanted to protect jobs at his enterprise, so he (to have to) (to sign) that contract. 8. Shortage of raw-materials (to be) the reason of termination of the contract. 9. By the end of February you (to be supplied) with all documents needed. lO.How long you (to issue) shares?

при каком значении a тождественно равны выражения 5x/(x-2) и 5+a/(2-x)