сократить дробь 2х²-5х+3

                                ------------

                                2х²+5х-7

Решить и объяснить точно.

Округлите числа 584,356 935,0846 0,8355 до единиц до десятых и до сотых

Запишите уравнения реакий нейтрализации используя следующие схемы     

                           ?+ HCL =AlCl3+? 

                            Mg(OH)2+?=MgSo4+?

                             ?+?=Pb(No3)2+?

                             Fe(OH)3+HCL=?+?

                            ?+H3Po4=K3Po4+?

                             LiOH+?=Li2So4+?    (8 класс)         Помогите плиз))   Билет взял   , а зава контр

20 What means of travel do you know? 21 Why are many people fond of travelling? 22 Why do some people like trav¬elling by train? 23 Do you like travelling by train? What makes you like/dislike it? 24 What are the advantages of a sea-voyage? 25 What are the dis/advantages of hitch-hiking? 26 What kind of people usually object to travelling by sea? 27 What are the advantages and disadvantages of travelling by air? Have you ever travelled by air? How do you like it? 28 What do you think about walking tours? 29 What is, in your opinion, the most enjoyable means of travel? 30Do you think travel helps a person to become wiser? 31 Does Kazakhstan have problems with environment? 32 What is Kazakhstan’s geography like? 33 What can you tell about Kazakhstan wedding traditions? 34 What is your native town? 35 Is your native town a small ancient place or a big modern city? 36 Where is your native town situated? 37 What river runs through the city? 38 What is your native town famous for? 39 Are there any architectural monuments in your town? What are they? 40 What famous people live/d there? 41 Which is the main street in your town? 42 Who is it named after? 43 Are there any industrial enterprises in your native town? 44 What goods do they produce? 45 What can you say about cultural life of your town? 46 How do people spend their leisure time? 47 Are there any everyday services in the town? 48 Are you proud of your native town? Why?