Lizzie plans to volunteer 3 hours a week at an animal shelter in addition to her library work. Rewrite the expression from the example to reflect this.

W = 7x + 3.

Step-by-step explanation:

Lizzie plans to volunteer 3 hours a week at an animal shelter in addition to her library work.

If she gives x hours per day in library work, then in a week she gives a total of 7x hours in library work.

Therefore, the total number of hours she works in a week (W) is given by

W = 7x + 3.

So, this equation is the expression from the given example. (Answer)