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 :

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

15-10-2016

2 girls = 1 boy
12 girls = 6 boys
12 + 6 = 18
girls = 12

Answer Link

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