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dmasya

Ответ:

Пошаговое объяснение:

7

a)4a=32

a=8(сторона квадрата)

S=a^2

S=4^2=16

б)2(a+b)=52

2(10+b)=52

20+2b=52

2b=32

b=16(длина)

S=a*b=16*10=160

в) 7a=56

a=8(длина)

8

a)V(скорость)*T(время)=S(расстояние)

S=8*12=96

б)V=S/T

V=60/10=6

в)T=S/V

T=42/14=3

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