3. Kay’s mother taught her how to make handmade ornaments to sell at a craft fair. Kay rented a table at the fair for $50 and set up her work station. Each ornament that she makes costs approximately $3.50 for materials. She sells each ornament for $7. a. If x represents the number of ornaments sold at the craft fair, which of the following expressions would represent Kay’s profit? (Select all choices that apply.)

7x-50

-50+7x-3.50x

7x-50-3.50x

3.50x-50

4.50x-50