A mathematical phrase containing variables, numbers, and operations is referred to as what?

A mathematical phrase that contains variables, numbers, and operations is specifically described as a variable expression. This is because a variable expression includes at least one variable, which represents an unknown value, alongside constants (numbers) and mathematical operations such as addition, subtraction, multiplication, or division.

In contrast, a numerical expression consists solely of numbers and operations without any variables. An arithmetic sequence, on the other hand, is a list of numbers where each term after the first is generated by adding a constant to the previous term, and a geometric sequence involves multiplication, where each term after the first is found by multiplying the previous term by a fixed, non-zero number. Therefore, the details of the query align most closely with the definition of a variable expression, making it the appropriate choice.