Question

Numerele naturale a,b,c sunt direct proportionale cu 2, 3, respectiv 5. Daca 4a-2b+3c=51, afla media artimetica a numerelor a, b ,c. HELP ME PLZZ!!

Answer 1

Răspuns:

Explicație pas cu pas:

a/2=b/3=c/5=k

a=2k,b=3k,c=5k

4a-2b+3c=51 => 4×2k-2×3k+3×5k=51

8k-6k+15k=51

17k=51 => k=51:17=3

a=2k=2×3=6

b=3k=3×3=9

c=5k=5×3=15

ma=(a+b+c)/3=(6+9+15)/3=30/3=10

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