Application: High-speed Trains

Many countries now have high-speed trains. Some of these trains can travel 150 mi/h or faster. The diagram below shows the average speeds for a number of the world's fastest trains. To find the fastest train, you need to convert all the speeds to the same units of measure.

Linear Equations and Functions

Application: Youth Service

City Year is a national youth service program that began with 57 members in Boston in 1989. The organization has expanded since then and currently has sites in cities across the country.

Systems of Linear Equations and Inequalities

APPLICATION: Cross-Training

Cross-training involves doing a combination of two or more types of exercise. Since different exercises use different muscle groups, cross-training is a good way to get a well-rounded workout.

Matrices and Determinants

APPLICATION: Music Sales

When you shop for music your purchases matter. Music sales by people age...