Răspuns:
Explicație pas cu pas:
b)
K= factor de proportionalitate
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a/ 1/5 =b/ 1/3 = k
5a= K→a= K/5
3b= K→b= K/3
a*b= K/5*K/3
540= K² /15
K²= 540*15
K²= 8100
K=√8100
K= 90
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a= 90 / 5= 18
b= 90*3= 30
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a)
a= x/100*b
18= x/100⁽¹⁰*30⁽¹⁰
18= 3x/10
3x= 180
x= 180 :3
x= 60
x= 60%
