Final answer:
The question lacks the context needed to accurately determine the final price of an item using the expressions given. Additional information about how these algebraic expressions relate to the item's cost is required to proceed.
Step-by-step explanation:
The student has provided a series of expressions and is asking to determine the final price for an item that costs $75. However, the expressions listed (such as 2x+5, x−3, 4x+10, and 3x−8) do not clearly relate to calculating the final price of an item. These seem to be linear algebraic expressions, and without further context or a specific instruction on how to apply these expressions to the item's cost, a final price cannot be accurately determined.
If these expressions were intended to represent discounts or markups (where 'x' could possibly stand for the item's base price), we would substitute 'x' with the item's cost. For instance, if 2x+5 represented a calculation to find a final price, we would calculate 2($75) + 5. Nevertheless, since the context is not clear, this is purely speculative.
In typical problems that apply algebra to financial calculations, expressions might represent discounts, taxes, or markups, and the variable 'x' could represent the starting price. For this problem, however, key information is missing to conclusively solve it.