9514 1404 393
Answer:
3.2 +r
Explanation:
When r is added to 3.2, the sum is ...
3.2 +r . . . . . . million dogs entering shelters annually
_____
Additional comment
The question asked cannot be answered using the information given in the problem statement. Information is given as to numbers of animals entering shelters. The question asks for the number of animals in shelters. That answer depends on the number leaving, which is not given.