Question

va rog repede dau coroana​

Answer 1

Răspuns:

a/b=9/5=>b=5a/9

b/c=18/25

(5a/9)/c=18/25

18c=25×5a/9

18c=1255a/9

9×18c=125a

162c=125a=>a/c=162/125

Answer 2

Explicație pas cu pas:

$\frac{a}{b} = \frac{9}{5}$

$\frac{b}{c} = \frac{18}{25}$

$\implies \frac{a}{c} = \frac{a}{b} \cdot \frac{b}{c} = \frac{9}{5} \cdot \frac{18}{25} = \bf \frac{162}{125}$