To make his nonstop transatlantic flight in this plane, Charles Lindbergh had to make careful calculations about the distance, average speed, time, and amount of fuel needed. In Lesson 8-5 you will learn how to solve problems involving distance, rate, and time.

In this chapter you will: learn how to solve systems of two equations in two variables by graphing solve systems of equations by the substitution and addition methods solve motion, digit, and coin problems using systems of equations