Ответ по предмету Алгебра: 1. Выразить переменные x и y из уравнений: a) 5x + 3y = 0 b) x – y = 5 c) x – 0,3y = 5 d) 2y + 3x = 7

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Очень срочно, помогите хоть что нибудь, вопрос жизни и смерти
1. Выберите правильный глагол:

I.     1.There … many
problems in the world. a)is, b)are, c)has, d)have.

          2.It is necessary … the
work on time. a)finish, b)finishing,
c)to finish, d)finished.

II.    1…. with a drunk driver … dangerous. a)ride, is; b)to ride, are; c)ride, are; d)to
ride, is.

           2.He … very pleasant to
deal with. a)have, b)has, c)are0 d)is.

III.     1.One of my friends … here. a)is, b)are,
c)has, d)have.

           2.The United States … a
population of 250 million people. a)is, b)have, c)are, d)has.

2,Выберите
правильную форму глагола:

    I.    1.Terry … my car when he had the accident.
a)was driving; b)drives; c)is driving; d)drove.

           2.Tomorrow at this
time, I … classes. a)will have attended;
b)will have been attending;

           c)will attend, d)will
be attending. 3.I … here for two years. a)lived; b)have lived; c)had

             lived; d)was living.

   II.    1.It is midnight. I … for five hours. a)was studying; b)am
studying; c)studied; d)have been

           studying. 2.Jenny …
school in1999. a)leaves, b)has left, c)left, d)was left. 3.Every morning

            the sun … in my
bedroom window and … me up. a)is shining, is waking; b)is shining,

            wakes; c)shines,
wakes; d)shines, is waking.

III.    1.She … the film on
TV before she read the book. a)saw, b)sees, c)has seen, d)had seen.

              2.After three days of rain, I’m glad that the
sun … again today. a)shining, b)is shining,

               c)shines, d)shone.
3.They … each other since 1998. a)know,
b)knew, c)have known,

              d)had known.

3. Выберите
правильную форму глагола:

    I.    1.French … in Belgium. a)is speaking, b)is
spoken, c)speaks, d)spoke. 2.Children … by

           special instructor how
to swim. a)have taught, b)had taught, c)are taught, d) teach.

   II.    1.The Statue of Liberty … to the Americans by the French.
a)gave, b)gives, c)was given,

            d)has given.
2.Yesterday a student trip to the planetarium … by Mrs. Hunt. A)was

            organized,
b)organized, c)had organized, d)is organized.

III.    1.My friend … by the police. a)interviewed,
b)has interviewed, c)will interview, d)was

             interviewed.
2.Tomorrow John … by Mary at the party. a)will help, b)will be helped, c)has

              helped, d)helps.

4. Выберите один
правильный вариант:

    I.    1.Christmas customs … the same around the
world. a)not, b)don’t, c)isn’t, d)aren’t. 2.My

           sister doesn’t like
rock music, and I don’t like it … .
a)neither, b)either, c)too, d)also.

   II.    1.My brother … like to go to school. a)not,
b)don’t, c)doesn’t, d)hasn’t. 2.They …
nothing

            about it. a)hadn’t
know, b)didn’t know, c)don’t know, d)knew.

   III.   1.Mary … to study yesterday. a)hadn’t, b)didn’t have, c)doesn’t have,
d)hadn’t have.

          2.Until yesterday I … her. a)hadn’t
seen, b)didn’t see, c)didn’t saw, d)hadn’t saw.

5. Определите:

I. вопросительное предложение:

      1.When it is cold people
wear warm clothes; 2.What a nice person she is; 3.Would you like

      some ice-cream; 4.What’s worrying me now is
her health.

II. правильное начало:

       1. … do you play tennis? –
About once a week. a)How often, b)How long, c)How many,

         d)How much.

III. правильный конец:

      1.Ann had to go to school.
a)did she? b)had she? c)hadn’t she? d)didn’t she?

6. Выберите соответствующую форму глагола:

I.     1.Charlie didn’t
know what Ann … doing. a)is, b)has, c)was, d)would. 2.Did you think you

            … to classes on time
that day? a)will come, b)would come, c)come, d)had come.

  II.    1.They expected him … at 7 o’clock. a)coming, b)come, c)came, d)to come.
2.I’d like your

            friend … us. a)join,
b)to join, c)joining, d)join to.

  III. 1.If she … exams, we
are going to take a long holiday. a)pass, b)will pass, c)passing,

          d)passes. 2.The new in the newspaper … surprising.
a)is, b)are, c)has, d)have.

1. Выразить переменные x и y из уравнений:a) 5x + 3y = 0b) x – y = 5c) x – 0,3y = 5d) 2y + 3x = 7​

Ответы

1. Выразить переменные x и y из уравнений:
a) 5x + 3y = 0
b) x – y = 5
c) x – 0,3y = 5
d) 2y + 3x = 7