Posted by stephanie on Tuesday, October 25, 2011 at 6:26pm.
Trevor buys 12 party favors. He spends the same amount of money on hats as on party favors. He spends twice as much on noisemakers as on party favors. How
many hats and noisemakers does he buy?
party favors for $0.75 each, hats for
$0.45 each, and noisemakers for he buy?

math  Steve, Wednesday, October 26, 2011 at 4:59am
Buy h hats, p partyfavors, n noisemakers
money: .75p = .45h
?n = 2*.75p
items: p = 12
p costs 12*.75 = 9.00
.45h = 9.00 so h = 20
?n = 18.00
Since we don't know how much noisemakers cost each, we're stuck. Their cost is 18.00.