Final answer:
The price of a pair of shoes plus a 6% tax is expressed as 1.06 times the original price, which is option A. This accounts for the original price and adds the tax to it.
Step-by-step explanation:
To write an expression that describes the price of a pair of shoes, x, plus a 6% tax, you need to calculate the total price including tax. The tax is 6% of the original price, which mathematically is 0.06 times x (or 0.06x). Add this tax to the original price to find the total cost: x plus 0.06x, which simplifies to 1.06x. Thus, the correct expression is x plus 0.06 times x, which can be written as 1.06x.