2/11(х+у) при х=-13, у=2,

 

-0.8ху при х=-10,у=-0.5

 

-3/4Х(х-у) при х=5,у=13.

 

 

 

(-4/5)Х(-3/8)Х(5/12)

(-9/10)Х5/6Х(-2/3)

 

 

-63Х(7-11)

9.9Х(3-5)

-2.2Х(8-3)

(26-11)Х(-0.4)

(32-40)Х3.5

(0.99-1)Х26

Упр. 184. Раскройте скобки, употребляя гла голы в одном из следующих времен: Present Continuous , Present Simple , Past Simple или Fut ure Simple . 1. Mother (to cook) a very tasty dinner yesterday. 2. Tomorrow Nick (not to go) to school. 3. Look! My friends (to play) football. 4, Kate (not to write) letters every day. 5. You (to see) your friend yesterday? 6, Your father (to go) on a business trip last month? 7. What Nick (to do) yester-1 day? 8. When Nick (to get) up every morning? 9, Where your mother (to go) tomorrow? 10. I (to invite) my friends to come to my place tomorrow. 11. He (not to play) the piano tomorrow. 12. We (to see) a very good film last Sunday. 13. Your [mother (to cook) every day? 14. We (to make) a [fire last summer. 15. I (to spend) last summer at the sea-side. 16. Where you (to spend) last summer? 17. Where he (to spend) next summer? ! 18. What mother (to do) now? — She (to cook) dinner. 19. I (not to play) computer games yesterday. 20. Last Sunday we (to go) to the theatre. 21. I (to (meet) my friend yesterday. 22. I (to write) a letter [to my cousin yesterday. 23, You (to write) a dictation tomorrow? 24. I (not to write) a report now.

Из поселка на станцию удаленную от него на расстояние 27 км, отправились одновременно пешеход и велосипедист, причем скорость пешехода была на 10 км/ч меньше скорости велосипедиста. Прибыв на станцию, велосипедист сразу повернул обратно и встретил пешехода через 2 часа 24мин. после его выхода из поселка. На каком расстоянии от поселка произошла встреча?

2

1) Fe + Cl2 - FeCl3 2) WO3 + C - CO2 + W 3) K + H3PO4 - K3PO4 + H2 4) Cl2 + H2O - HClO + HClO3 5) Br2 + H2 - HBr 6) Al2O3 + C -- Al + CO2 7) SiO2 + Mg - MgO + Si 8) Ca + P - Ca3P2