Question

Media aritmetica a doua nr este egala cu 3,09. Aflati cele dou nr daca unul este dublul celuilalt.

Answer 1

[tex]m_a=\frac{a+b}{2}=3,09\\a+b=3,09*2\\a+b=6,18\\a=2b\\2b+b=6,18\\ 3b=6,18\\b=\frac{6,18}{3}\\b=2,06\\a+2,06=6,18\\a=6,18-2,06\\a=4,12[/tex]

Answer 2

a+b=3.09x2
a+b=6.18
a=2b
2b+b=6.18
b=3.16:3
b=2.06
a=2.06x2
a=4.12