Сколько квадратных метров площади сада занимают яблони, если пдощадь под яблонями составляет две третьих части всей площади сада

Sвсего участка=a*b=30*20=600 м^2 s яблонь=(2/3)*s сада=(2/3)*600=400 м^2

School uniforms can be different. someone who likes to loose, someone loves strict . but the classical school uniforms for me still remains white top black bottom . certainly convenient to walk to school in the free form and mood rises , but then everyone would go to school as the street, and generally will not discipline . in my opinion school uniform should be comfortable, but at the same time practical beautiful. not necessarily, that would be all the same as one walked . it is important that at least the tone of all forms was the same . indeed, often it happens that someone shape black , gray someone , and someone even blue . it would be good if there were a choice between sundresses and skirts that you could choose to wear a vest , or simply blouse. and be sure to that would have introduced a day when students can come in free form . one day a week . for example , on saturday, in a short day , or monday , that would be preserved the atmosphere of relaxation . general school uniform should first like the student that would go to school with mood.

ответ:

разделить число:

а)91 в отношении 8: 18

  8+18=26(частей)

  91: 26*8=28         а можно и так:   91: 26*8=28

  91: 26*18=63                                 91-28=63

  ответ: 28 и 63

 

б)129,6 в отношении 7: 12: 2,6

  7+12+2,6=21,6

  129,6: 21,6*7=42

  129,6: 21,6*12=72

  129,6-(42+72)=15,6

  ответ: 42, 72 и 15,6

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