8 c) [tex] \frac{2,4}{x} = \frac{4}{1,6} \\ x= \frac{2,4*1,6}{4} = \frac{3,84}{4} =0,96[/tex]
10 a)
[tex] \frac{25}{75} = \frac{3}{x} \\ x= \frac{3*75}{25} = \frac{225}{25} =9[/tex]
[tex] \frac{25}{180} = \frac{3}{x} \\ x= \frac{180*3}{25} = \frac{540}{25} =21,6[/tex]
[tex]\frac{25}{0,5} = \frac{3}{x} \\ x= \frac{3*0,5}{25} = \frac{1,5}{25}= 0,06[/tex]
b)
[tex]\frac{25}{x} = \frac{3}{4,5} \\ x= \frac{25*4,5}{3} = \frac{112,5}{3}=34,5[/tex]
[tex]\frac{25}{x} = \frac{3}{0,6} \\ x= \frac{25*0,6}{3} = \frac{15}{3} =5[/tex]
[tex]\frac{25}{x} = \frac{3}{0,5} \\ x= \frac{25*0,5}{3} = \frac{12,5}{3} =4,2[/tex]
11)
[tex] \frac{5}{150} = \frac{30}{x} \\ x= \frac{150*30}{5} = \frac{4500}{5} =900[/tex]
