Question

va rog ex III punctele a, b, c si d​

Answer 1

Răspuns:

Explicație pas cu pas:

a)

3a/5b = 2/3

9a = 10b

b/a = 9/10 = 0,9 (raspuns 2)

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b)

3,2% = 3,2/100 = 32/1000 = 4/125 (am simplificat cu 8; raspuns 1)

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c)

a/2 = 5/4

a = 10/4

100a = 1000/4 = 250 (raspuns 5)

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d)

a/b = x/y

ay = bx

ay/bx = 1

2 - ay/bx = 2 - 1 = 1 (raspuns 3)

Answer 2

Răspuns:

a) 3a/5b=2/3=>3a·3=5b·2=>9a=10b=>b/a=9/10=0,9=>raspuns 2

b) 3,2%=3,2/100=32/1000=4/125 => raspuns 1

c) a/2=5/4=>4a=5·2=>a=10/4=2,5

100a=100·12,5=250 raspuns 5

d) a/b=x/y=>ay=bx=1=>2-ay/bx=2-1 =1 raspuns 3