Chapter 6.5, Problem 39PPE

To determine

To calculate:write and graph an inequality to show how many CDs you could buy and sell.

Answer to Problem 39PPE

  $5x-1.5y<10$

  

Explanation of Solution

Calculation:

Let’s first formulate equations for given situations,

Let’s say you choose to buy $x$ CDsand sell $y$ CDs.

Now, You want to have at least $\$10$ left when you leave the store, That means you will spend less than $\$10$ among $\$20$ ,

  $\therefore 5x-1.5y<10$

Let’s plot these two inequalities,

  

Red area is a common area of solution.