Question

Daca a + b = 7,7 si b + c = 2,78 calculati 9a + 11b + 20 - Aratati ca numarulm 11010​

Answer 1

Răspuns:

Explicație:

Daca a + b = 7,7 si b + c = 2,78 calculati 9a + 11b + 2c

9a+11b+2c= 9a+9b+2b+2c=9·(a+b)+2·(b+c)=9·7,7+2·2,78=

69,3+5,56= 74,86  

9a+11b+2c=74,86