SOLUTION: suppose you bought supplies for a party. Three rolls of streamers and fifteen party hats cost $30. Later, you bought two rolls of streamers and four party hats for $11. Write and s

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: suppose you bought supplies for a party. Three rolls of streamers and fifteen party hats cost $30. Later, you bought two rolls of streamers and four party hats for $11. Write and s      Log On


   

Question 809702: suppose you bought supplies for a party. Three rolls of streamers and fifteen party hats cost $30. Later, you bought two rolls of streamers and four party hats for $11. Write and solve a system of equations to determine the cost of streamers and party hats. find their costs.
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
3s + 15h = 30
2s + 4h = 11
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3s + 15h = 30
s + 5h = 10
s = 10 - 5h
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2s + 4h = 11
2(10 - 5h) + 4h = 11
20 - 10h + 4h = 11
9 = 6h
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h = $1.5
s = $2.5
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