Final answer:
To find the combined inventory of the two stores, add the expressions for Store A and Store B.
Step-by-step explanation:
To find the expression that represents the combined inventory of the two stores, we need to add the inventory of Store A and Store B.
The inventory in Store A is given as 1/3² + 1 and the inventory in Store B is given as 39?-19.
To combine the inventories, we simply need to add the two expressions together: 1/3² + 1 + 39?-19.