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Не выполняя построения графиков, найдите координаты точки пересечения прямых
б)75x-1 и y=78x
Ответы 1
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Приравняем уравнения:75x-1=78x75-78x=1-3x=1x=-1/3Найдем значение у:y=78*(-1/3)= -26Ответ: координаты точки пересечения: (-1/3; -26)
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Автор:
vidalnxqy - 6 лет назад
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a) is b) are c) be d) am
1 _____ David happy? Yes, he is.
a) Are b) Aren’t c) Is d) Isn’t
2 There _____ any cars in the car park.
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3 Karol _____ at school. He is a teacher.
a) doesn’t work b) works c) don’t work d) work
4 _____ she need a car? Yes, she does.
a) Am b) Is c) Do d) Does
5 _____ is Istanbul? In Turkey.
a) Where b) When c) What d) Which
6 _____ is he unhappy? I don’t know.
a) How b) Why c) Who d) Does
7 Sarah is the champion. She _____ wins.
a) always b) rarely c) never d) occasionally
8 Do you have _____ umbrella?
a) a b) an c) the d) (no word – write Ø)
9 _____ you help me please?
a) Can b) Do c) Can’t d) Don’t
10 Germany is _____ bigger than Italy.
a) (no word – write Ø) b) more c) the d) most
11 Iwona is _____ best student in the class.
a) a b) an c) the d) (no word – write Ø)
12 I _____ some chocolate in my bag.
a) has b) have c) doesn’t have d) don’t have
13 How _____ money is there in the bank?
a) much b) many c) some d) any
14 We _____ in Rome at the moment.
a) to live b) are living c) lives d) is living
15 I _____ studying these days.
a) is not b) do not c) are not d) am not
16 It _____ very cold yesterday.
a) is b) are c) was d) were
17 I _____ drive a car at six years old but now I drive all the time.
a) can b) could c) can’t d) couldn’t
18 _____ you fly to France last year?
a) Did b) Was c) Were d) Do
19 Last night I _____ spaghetti.
a) eat b) eaten c) ate d) eating
20 My TV is old. I _____ buy another one.
a) should b) would c) could d) couldn’t
21 You don’t _____ buy a dictionary. I have one.
a) should b) have to c) could d) will
22 At the end of the course, we _____ have an exam.
a) do b) will c) (no word – write Ø) d) are
23 What are you _____ eat tonight?
a) going b) have c) will d) going to
24 I have never _____ that film.
a) see b) seen c) saw d) sees
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a) Do b) Will c) Are d) Have
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31 Did you hear the new song by the Matches on _____ radio last night?
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36 There are very _____ tomatoes in the shop. I’ll have more tomorrow.
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37 There _____ rain tomorrow.
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39 You _____ a ticket before you get on the train.
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40 Has Mark received a letter _____ the bank?
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41 Old people usually _____ pay to use the bus.
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42 Have you ever thought _____ a doctor?
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43 This lesson is so _____.
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