Final answer:
The only expression that equals the number 2 regardless of the value of x is B. 5x² + 2x + 17, when x is equal to 0.
Step-by-step explanation:
The expression that represents the number 2 is B. 5x² + 2x + 17 when x equals 0. This is because plugging 0 into the variable x yields 5*(0)² + 2*0 + 17, which simplifies further to 0 + 0 + 17, giving a final answer of 17. The other expressions, such as 22x² or 1/2 x², depend on the value of x and can represent a wide range of numbers, but not necessarily the number 2 for any x value. Similarly, 0.2x - 32 does not yield the number 2 for any value of x.