Question

Vă rog repede e urgent. ​

Answer 1

Răspuns:

Pₐ = 6,65·x + 5,5·y ;  Pb = 3,8a  + 9√3y

Explicație pas cu pas:

Perimetrul figurii a = Pₐ

Pₐ = 3x + 1,5x + 5/4 x + y + y + 5/4 y + 0,9x + 2 si 1/4 y

Pₐ = x·(3+1,5+5/4+0,9) + y·(1+1+5/4+2 si 1/4)

Pₐ = x·(4,5+1,25+0,9) + y·(2+1,25 + 9/4)

9/4 = 2,25

Pₐ = 6,65·x + 5,5·y = 665x/100 + 55y/10 =

= 133x/20 + 110y/20 = (133x+110y)/20

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Perimetrul figurii b = Pb

Pb = 0,8a + 0,7a + 4/5 a + 2√3y + √3y + 3√3/2 y + 3√3/2 y + √3y +

+ 2√3y + 4/5 a + 0,7a

Pb = a·(0,8+0,7+0,8+0,8+0,7) + y·(2√3+√3+ 3√3/2+ 3√3/2+√3+2√3)

Pb = a·3,8 + y·(6√3 + 3√3) => Pb = 3,8a  + 9√3y

Pb = 19a/5 + 9√3y = (19a + 45√3·y)/5