Вопрос школьника по предмету Математика
Выразите переменную y через переменную x, найдите два каких-нибудь решения уравнений:
1)–2x+y=7
2)4x–y=3
3)–x+2y=5
Ответ учителя по предмету Математика
Решение:
1) -2x+y=7, y=2x+7.
(0;7),(1;9)
2) 4x-y=3, y= 4x-3.
(1;1),(0;-3).
3) -x+2y=5, y=0,5x+2,5.
(0;2,5),(2;3,5).
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A curiosity about the whale has been a part off me for as long as I can remember. When I was a very small child, my grandfather used to sing a song that that began:
In The North Sea lived a whale
Big of done and large of tail…
The song went on to describe how this whale was the master of his world until theday when it met a stranger: a big greaming silver fish who refused to acknowledge the whale’s mastery.The whale grew angry and slapped the stranger with its tail. That was a fatal mistake, because the atrange fish was actually a torpedo. The mortal of the song was: it does not pay to be a bully. Inever understood it that way, me sympathy was with the whale — the victim, as it seemed to me symped to me, of a very dirty trick.
As I grew older,the whale became a symbol of ultimate secrets that have not yet been revealed to us. Whenever anything came about whales, I understood from all my reading was that the whales were doomed to disappear and carry their secrets with them.