[blanca3]

I have Algebra 2 homework and I don't understand one of the questions.
May someone help me?

Here's the problem:
The usual toll charge to use the Bingham tunnel is 50 cents. If you purchase a special sticker for $5.50, the toll is only 35 cents. At least how many trips through the tunnel are needed before the sticker costs less than paying for each trip separately?

[ebaines]

You can set up a simple algebra equation, and use normal algebra rules to manipulate, like this:

Let T = number of trips through the toll.
Cost without tag = $0.50*T
Cost with tag = $5.50 + $0.35*T

For the cost of the toll using the tag to be less than the cost withot the tag, set up and solve:

$5.50 + $0.35*T < $0.50*T

What you'll find is that the solution for T is not a whole number, so you will have to round up to the next whole number.