# Suppose a video store charges non-members $4 to rent a video. A membership costs $21 and then videos cost only $2.50 to rent. How many videos would you need to rent in order to justify a membership?

##### 1 Answer

Mar 3, 2018

You need to rent

#### Explanation:

We can create an equation. Say the number of videos you rent is given by

To find the value of