# Example 4

- Author:
- Walch Education

- Topic:
- Inequalities

A school supply company produces wooden rulers and plastic rulers. The rulers must first be made, and then painted.

- It takes 20 minutes to make a wooden ruler. It takes 15 minutes to make a plastic ruler. There is a maximum amount of 480 minutes per day set aside for making rulers.
- It takes 5 minutes to paint a wooden ruler. It takes 2 minutes to paint a plastic ruler. There is a maximum amount of 180 minutes per day set aside for painting rulers.

- Use what you know about the constraints on the real-world situation to determine any limits on the possible solutions.
- Choose a value for
*w*and solve the first two inequalities in the system for*p*. - Interpret the results.