Chris wants to order dvds over the internet each dvd cost $15.99 and shipping the entire order cost $9.99 if you can spend no more than $100, how many dvds could he buy?

You could buy 5 DVDs. If you bought 5 DVDs, your total charge would be $89.94.

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.