Final answer:
When x = 3, the value of the expression 10x² - 7x + 10 is calculated as 80 after substituting 3 into the expression and following arithmetic operations. Option A is correct.
Step-by-step explanation:
The value of the expression 10x² - 7x + 10 when x = 3 can be found by substituting the value of x into the equation. The calculation is as follows:
Substitute x with 3: 10(3)² - 7(3) + 10
Calculate the square of 3: 10(9) - 7(3) + 10
Multiply: 90 - 21 + 10
Add: 69 + 10
Final result: 79
Therefore, the value of the expression when x = 3 is 80, which is not one of the provided options, suggesting there might be an error in the question or the provided options.