Question

va roggg dau coroana

Answer 1

IV
a)x/2=y/3=z/5=k
x=2k
y=3k
z=5k
2k+3k+5k=60
10k=60
k=6
x=12
y=18
z=30

b)2x=3y=6z=k
x=k/2
y=k/3
z=k/6
k/2 + k/3 + k/6 = 90
Numitor comun 12
6k+4k+2k=90•12
12k=90•12
k=90
x=45
y=30
z=15

V
0,1=1/10
0,(1)=1/9
a/10=b/9=k
a=10k
b=9k
(10k+9k)/2=28,5
19k=57
k=3
a=30
b=27

Answer 2

1 ex: 60:2=30 60:3=20 60:5=12

90:1/2=180 90:1/3=270 90:1/6=540

2 ex:0,1=1/10===>a=10 Ma = (a+b)/2 =28,5

(10+b)/2=28,5

10+b =57

b=47

Sper ca iti este de folos!