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ПрофиЗнания 7 лет назад
Лучший ответ
Проверен экспертом
x²-9x+20=0
D=81-4*20*1=81-80=1
x1=(9+1)/2=10/2=5
x2=(9-1)/2=8/2=4
ПрофиЗнания 7 лет назад
Лучший ответ
Проверен экспертом
p+1,4-p=1,4
__________
ПрофиЗнания 7 лет назад
Лучший ответ
Проверен экспертом
[tex]-8,3-(-x-8,3) = -8,3+x+8,3=x[/tex]

[tex]m-(n+m)=m-n-m=-n[/tex]
ПрофиЗнания 6 лет назад
Find the correct answer:

\n1. Choose the correct synonym.
\nThis kind of work requires much patience.
\nA:contains
\nB: compared
\nC:evokes
\nD:reduced
\nE: needs

\n2. Insert the correct word:
\nChanel № 5 …. by the French fashion designer Coco Chanel in the 1920s.
\nA : has finished
\nB : was introduced
\nC : was seen
\nD : done
\nE : liked


\n3. My sister ___ speak three languages perfectly.
\nA : is able to B : are able to C : were able to D : be able to E : am able to

\n4. He loves to ___ himself in the mirrow.
\nA : look at B : looking at C : looked at D : is looked at E : has looked at

\n5. Insert the correct word:
\nTai- Chi is a Chinese…….art.
\nA :fine B : old C :nice D : martial E :common

\n6. Choose the correct degree of comparison:
\nI love all the usual things but ... of all I love people.
\nA: many B: most C: much D: more E: the many

\n7.Choose the correct answer.
\n People can be worried about ...... their job.
\nA : to lose B : to be lost C : have lost D : lose E : losing

\n8. Choose the correct modal verb : She ________ stay with her sister
\nA : doesn’t have B : don’t have C : doesn’t have to D : hasn’t to
\nE : don\'t have to

\n9. Choose the correct item: He said,\' I have done amazingly well today\'.
\nA : He said that I have done amazingly well that day
\nB : He said that he has done amazingly well that day
\nC : He said that he had done amazingly well that day
\nD : He said that he did amazingly well that day
\nE : He said that had done amazingly well that day

\n10. Choose the correct modal verb : His best friend says he ______ teach English somewhere sunny.
\nA : haven’t to
\nB : shouldn’t to
\nC : could to
\nD : hasn’t to
\nE : should

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