orengprecious166 orengprecious166
  • 01-10-2020
  • Mathematics
contestada

when i was 18 years old, my sister was half my age. Now I am 82 years. How old is my sister now?​

Respuesta :

Hi1315
Hi1315 Hi1315
  • 01-10-2020

Answer:

[tex]41 \: \: \: years \: \: \: old[/tex]

Step-by-step explanation:

[tex]me \: \: \: \: \: \: \: \: \: \: \: sis \\ 18 \: \: \: \: \: \: \: \: \: \: \: \: 9 \\ 82 \: \: \: \: \: \: \: \: \: \: \: x \\ \\ use \: \: cross \: \\ multipaction \\ \\ 18x = 82 \times 9 \\ 18x = 738 \\ \frac{18x}{18} = \frac{738}{18} \\ x = 41[/tex]

Answer Link
ricchad
ricchad ricchad
  • 01-10-2020

Answer:

41 y/o

Step-by-step explanation:

its a ratio and proportion:

18 y/o   =   82 y/o        

9 y/o         x

82(9) = 18(x)

x = 738 / 18

x = 41 y/o

Answer Link

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