# How do you solve and graph the compound inequalities #30 < 10u < 120#?

##### 1 Answer

May 5, 2015

Remember you can perform the following operations on both sides of an inequality without changing the inequality:

- Add or subtract any number
- Multiply or divide by any positive (and non-zero) number

So

can be simplified as

The image below shows this relation graphed on a number line and in Cartesian space