Problema Solution
Suppose you bought supplies for a party. Three rolls of streamers and 15 party hats cost $30. Later, you bought 2 rolls of streamers and 4 party hats for $11. How much did each roll of streamers cost? How much did each party hat cost?
Answer provided by our tutors
let
s = the cost of a roll of streamer
h = the cost of a party hat
three rolls of streamers and 15 party hats cost $30
3s + 15h = 30
2 rolls of streamers and 4 party hats for $11
2s + 4h = 11
by solving the system of equations
3s + 15h = 30
2s + 4h = 11
we find
s = $2.5
h = $1.5
click here to see the step by step solution of the system of equations
the roll of streamers costs $2.5.
the party hat costs $1.5.