Unlike equations, algebraic expressions do not need to have equal signs?

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation

Astore has apples on sale for three dollars or 2 pounds how many pounds of apples can you buy for nine dollars if an apple is approximately 5 ounces how many apples can you buy for nine dollars

Reagan lives five miles farther from school than vanessa lives. write an expression to describe how far reagan lives from school