Предмет: Алгебра, автор: Ироинна

Найдите значение параметра а , если известно , что прямая ах+6у=4 проходит через точку (2;1)

Ответы

Автор ответа: Yumma
0
Подставим в уравнение координаты точки (2; 1), у которой х=2, у=1
Получается а*2+6*1=4
2а=4-6
2а= -2
а= -1
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1.Write the correct reflexive pronoun in the gap.
1 Did you hurt ............ badly in the accident?
2 He made the meal ................................. .
3 We don’t need any help. We are going to do it ..................................................... .
4 We usually go to the gym by ................ .
5 The computer switched off by ................ .
6 The student introduced ....................to the class.

2. Fill in the gaps with apart, behind or out.
1 Bob has fallen ................ with Sam because he broke his MP3 player.
2 She fell ................ with her schoolwork when she was ill.
3 The bookcase fell ................ as soon as we placed some books on it.
3. Fill in the correct word.
*sore *ache *miserable *chip *flu *sprain *hurt *appointment
1 Can I have some honey, please? My throat is ............................... .
2 I have a(n) ............................ to see the doctor this afternoon.
3 Polly didn’t go to school today as she had a stomach .......................... .
4 John has ....................... his back and has to rest.
5 When you ............................ a tooth you have to go to the dentist.
6 What happened? Did you ......................... your wrist?

4. Match the words in Column A to the words in Column B.

1.wash A a light meal
2.put ....... B plenty of fluids
3. drink ....... C some rest
4. eat ....... D a painkiller
5.get ....... E with cold water
6.take ....... F a cold pack on your forehead

5. Open the brackets
1. Unless they …….(live) the house, they …..(miss) their flight.
2. If you ……(not/revise) early, you (not/do) your test well.
3. If he ……..(not/have) a stomachache, he …. (go) to school.
4. Unless I ……(exercise) regularly, my body …..(not/be) healthy.
5. Unless you …….(learn) some new rules, you ……(not/know) how to do this exercise.
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