Need another help with a math problem

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Mrs. Brown's Girl Scout troop had a car wash to earn some funds. They saved 1/6 of the money. They used 1/2 of the remaining money to go horseback riding. They then had $100.00 left. How much did they initially make washing cars?

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[+1] - aidan - 01/28/2009Go backwards. Start with a hundred and do the opposite of what's been done.
[+1] - fresco - 01/28/2009Draw a circular pizza cut into 12 slices Shade out portions for 1/6 and 1/2 of the [i]remaining[/i] pizza. Write Â£100 on the piece remaining by dividing it equally across its slices....
[+1] - aidan - 01/28/2009and then make sure you convert pounds to dollars- I think the exchange rate is at Â£1 to $1.35 right now (as per the newspaper yesterday anyway). *sorry fresco couldn't resist
[+1] - fresco - 01/28/2009These days, nobody can afford a whole pizza over here !
[+1] - Brandon9000 - 02/05/2009[quote="Primotivo"] Mrs. Brown's Girl Scout troop had a car wash to earn some funds. They saved 1/6 of the money. They used 1/2 of the remaining money to go horseback riding. They then...

@Primotivo,

Go backwards. Start with a hundred and do the opposite of what's been done.

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@Primotivo,

Draw a circular pizza cut into 12 slices
Shade out portions for 1/6 and 1/2 of the remaining pizza.
Write £100 on the piece remaining by dividing it equally across its slices.
Now you have the value of one slice...therefore the whole lot.

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@fresco,

and then make sure you convert pounds to dollars- I think the exchange rate is at £1 to $1.35 right now (as per the newspaper yesterday anyway).

*sorry fresco couldn't resist

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@aidan,

These days, nobody can afford a whole pizza over here !

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@Primotivo,

Primotivo wrote:

Mrs. Brown's Girl Scout troop had a car wash to earn some funds. They saved 1/6 of the money. They used 1/2 of the remaining money to go horseback riding. They then had $100.00 left. How much did they initially make washing cars?

If I understand you correctly, "the remaining money" is 5/6 of the original total. Half of this was spent on the horseback riding, leaving 5/12 of the original amount, and thats equal to $100.

(5/12)X = $100
X = 12/5 * $100 = $1200/5 = $240.

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Need another help with a math problem

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