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RedeemSearch found 3 matches
- by cabate2000
Tue Dec 01, 2009 9:31 am- Forum: Problem Solving
- Topic: Word Problem
- Replies: 9
- Views: 1827
Close enough doesn't count. Sorry. The reason it's so close is that 0.18 is really small relative to $5 or $3. You have to "undo" the equation you put forward. If you set d, then multiply by 1.04 and then subtract, to "undo" you must add first, then divide the sum. Try answer C ...
- by cabate2000
Tue Nov 17, 2009 3:46 pm- Forum: Problem Solving
- Topic: Word Problem
- Replies: 9
- Views: 1827
Why is the answer not C? If you assume gas costs $3.00 a gallon for the dealer (d), then you add tax and get $3.00 + $0.12 + 0.18 = $3.30 gallon (p) Plugging into answer C d = (p/1.04) - 0.18 $3.00 = ($3.30/$1.04) - $0.18 $3.00 = $3.17-$0.18 (close enough) Trying a different price, the formula still...
- by cabate2000
Tue Nov 17, 2009 3:21 pm- Forum: Problem Solving
- Topic: Word Problem
- Replies: 9
- Views: 1827