1. Hideki buys a skateboard that costs dollars. After sales tax is added, the total cost can be ex-
   pressed by the expression . What is this expression written in simplest form?
   
   
   
   

When Hideki buys the skateboard for dollars, adding sales tax can be simplified by factoring out from the expression , which gives us . This is the expression representing the total cost, showcasing how the base price and the tax combine neatly!

Now, let’s break it down further. If you calculate , you get , which means the total cost can also be represented as . So, while both and express the total cost, using the first format highlights the original price along with the addition of the tax. Perfect for visual learners!