anquiper
anquiper anquiper
  • 15-10-2016
  • Mathematics
contestada

in a class of 18 there are 2 girls for every 1 boy. how many girls are there?

Respuesta :

nisiii nisiii
  • 15-10-2016
x-girls y-boys

if x+y=18 and 2x=y then


x+2x=18
3x=18
x=6
Answer Link
Haneefahr13
Haneefahr13 Haneefahr13
  • 15-10-2016
2 girls = 1 boy
12 girls = 6 boys 
12 + 6 = 18 
girls = 12
Answer Link

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