Question

algebraic symbols in physics equations represent physical quantities, therefore multiple choice the symbols are only abstract. the symbols represent numbers only. the symbols represent numbers and units. the symbols consist of units only. the symbols are only imaginary.

Explanation:

In physics, algebraic symbols in equations stand for physical quantities. A physical quantity has a numerical value (number) and a unit (e.g., 5 meters: 5 is the number, meters is the unit). So the symbols represent both numbers and units. Other options are incorrect: "only abstract/imaginary" ignores physical meaning, "only numbers/units" is incomplete as quantities need both.

Answer:

the symbols represent numbers and units.