Valentina's parents are planning a trip to the Typhoon Towers resort. They plan to get a 6-day Fun Pass, which will give Valentina access to all the slides and pools at the resort during their stay. Her parents also plan to get her a $30 arcade pass. Altogether, Valentina's parents will spend $129 on passes. What is the daily cost of a Fun Pass?

Let's assume the daily cost of a Fun Pass is x.

Valentina's parents will be at the resort for 6 days, so they will spend 6x dollars on fun passes.
In addition to the fun passes, Valentina's parents will spend 30 dollars on an arcade pass.
So, 6x + 30 = 129 dollars.
Subtracting 30 from both sides of the equation, we get 6x = 99.
Dividing both sides of the equation by 6, we get x = 99/6 = <<99/6=16.5>>16.5 dollars.
Therefore, the daily cost of a Fun Pass is $16.5. Answer: \boxed{16.5}.

To find the daily cost of a Fun Pass, divide the total cost of the Fun Pass by the number of days it covers.

Let's say the daily cost of a Fun Pass is "x."

Therefore, multiplying the daily cost "x" by the number of days "6" should give us the total cost of the Fun Pass.

So, the equation becomes:
6x = $129

Divide both sides of the equation by 6:
x = $129 / 6

x = $21.50

Therefore, the daily cost of a Fun Pass is $21.50.

To find the daily cost of a Fun Pass, we'll need to divide the total cost of the pass by the number of days it is valid for.

In this case, Valentina's parents are getting a 6-day Fun Pass and spending $129 on all the passes, including the arcade pass. To find the daily cost, we divide the total cost by the number of days:

Daily cost = Total cost / Number of days

Total cost = $129
Number of days = 6

Plugging in these values, we get:

Daily cost = $129 / 6

Dividing $129 by 6 gives us a daily cost of approximately $21.50.

Therefore, the daily cost of a Fun Pass is approximately $21.50.