Question

Raportul a 2 nr e 5/7 si media lor aritmetica e 29,4.Aflati nr.
RASPUNDETI REPEDE VA ROG!!!!!

Answer 1

$\frac{a}{b} = \frac{5}{7}$

$7a = 5b$

$a = \frac{5b}{7}$

$\frac{a + b}{2} = 29.4 \: | \times 2$

$a + b = 58.8$

$\frac{5b}{7} + b = 58.8 \: | \times 7$

$5b + 7b = 411.6$

$12b = 411.6$

$b = \frac{411.6}{12}$

$b = 34.3$

$a = \frac{5b}{7}$

$a = \frac{5 \times 34.3}{7}$

$a = \frac{171.5}{7}$

$a = 24.5$