Answer: Let's start by setting up some equations based on the given information:
The cost of the burger is 1/3 of the cost of the souvenir:
burger = (1/3) * souvenir
The cost of the souvenir is 1/2 of the cost of the pass:
souvenir = (1/2) * pass
Chelsea had $4.00 left over after buying these items:
burger + souvenir + pass + 4.00 = 21.50
Now we can use these equations to solve for the cost of each item.
Substituting equation 2 into equation 1, we get:
burger = (1/3) * ((1/2) * pass)
burger = (1/6) * pass
Substituting this expression for burger into equation 3, we get:
(1/6) * pass + (1/2) * pass + pass + 4.00 = 21.50
Combining like terms, we get:
(11/6) * pass = 17.50
Solving for pass, we get:
pass = (6/11) * 17.50
pass = $9.55
Using equation 2, we can find the cost of the souvenir:
souvenir = (1/2) * pass
souvenir = (1/2) * 9.55
souvenir = $4.78
Finally, we can use equation 1 to find the cost of the burger:
burger = (1/3) * souvenir
burger = (1/3) * 4.78
burger = $1.59
So, the cost of the burger was $1.59, the cost of the souvenir was $4.78, and the cost of the pass was $9.55.
Explanation: