Understanding Polynomial Functions

We will solve this system of equations by Elimination. Multiply both sides of the first equation by 2, to get:

Then add this new equation, to the second original equation, to get:

or

Plugging this value of back into the first original equation, gives:

or

Substitute into , and then substitute the answer into .

* We have to change the time from minutes to hours, there are 60 minutes in one hour.