### Home > AC > Chapter 5 > Lesson 5.1.3 > Problem 5-31

5-31.

**5-****31.** Mailboxes Plus sends packages overnight for $5 plus $0.25 per ounce. United Packages charges $2 plus $0.35 per ounce. Mr. Molinari noticed that his package would cost the same to mail using either service. How much does his package weigh? 5-31 HW eTool (Desmos). Homework Help ✎

Write equations for both brands.*y* = total cost*x* = weight in ounces

Mailboxes Plus: *y* = 0.25*x* + 5

United Packages: Write a similar equation.

Set the equations equal to each other to solve for *x*.

Complete the tables in the eTool below to graph the results.

Click the link at right for the full version of the eTool: AC 5-31 HW eTool