SOLUTION: There are 385 surfers in Surf City. Two thirds of the boys are surfers and one-twelfth of the girls are surfers. If there are two girls for every boy, then how many boys and how ma
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Question 197074: There are 385 surfers in Surf City. Two thirds of the boys are surfers and one-twelfth of the girls are surfers. If there are two girls for every boy, then how many boys and how many girls are there in Surf City?
1/12x + 2/3y=385 x=girls y=boys this is what i have so far this will have two equations where ill have to add fractions but im not sure what teh second equation is. Can anyone please help me with the equations pleaseeeeeeeeeee... thanks for all ya do shari
You can put this solution on YOUR website! There are 385 surfers in Surf City. Two thirds of the boys are surfers
and one-twelfth of the girls are surfers.
If there are two girls for every boy, then how many boys and how many
girls are there in Surf City?
:
You got a good start x + y = 385
Get rid of those annoying fractions, multiply by 12
x + 4(2y) = 12(385)
x + 8y = 4620
:
Then it says,"there are two girls for every boy" therefore we can say:
x = 2y
:
substitute 2y for x:
2y + 8y = 4620
10y = 4620
y =
y = 462 boys, obviously then, 924 girls
:
:
Check solution in original equation: x + y = 385 (924) + (462) =
77 + 308 = 385; confirms our solution
;
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