Which of the following terms can mean "equals" in mathematical expressions?

The term that means "equals" in mathematical expressions is "is." In mathematics, "is" serves as a verb that indicates equivalence or equality between two expressions. For example, in the equation "2 + 2 is 4," the use of "is" signifies that the expression on the left side (2 + 2) is equivalent to the value on the right side (4).

The other terms do not function as synonyms for "equals." "Sum" refers specifically to the result of adding two or more numbers together, while "ratio" denotes a relationship between two numbers indicating how many times one value contains or is contained within the other. "Quotient" is the result of division, indicating how many times one number can be subtracted from another. Each of these terms describes specific mathematical operations or relationships but does not convey the concept of equality like "is" does.