Question

help pls ms anticipat

Answer 1

Răspuns:

Explicație pas cu pas:

2)

x=2K

y=3K

(3*2K +2*3K )/ (3*3K-2*2K )

=( 6K+6K)/ (9K-4K)

= 12K/5K

= 12/5= 2,4 (a)

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3)

a/3=8

a= 8*3

a=24

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b/5=8

b=8x5

b=40

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24+40=64 (d)

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4)

4*(x-1)=3*(x+1)

4x-4=3x+3

4x=3x= 3+4

x=7 ( e)

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5)

Sc= 1/500.000

d harta =20cm

d teren =?

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1/500.000=20 cm

d teren =20*500.000

d teren= 10.000.000 cm

d teren= 100 km (b)