Answer :
Final answer:
To find f(3) for the function f(x) = -5x² - x + 20, substitute x = 3 into the function to get f(3) = -28. Therefore, the correct answer is A.
Explanation:
To find f(3) for the function f(x) = -5x² - x + 20, we substitute x = 3 into the function.
So, f(3) = -5(3)² - (3) + 20.
Simplifying the expression, we get f(3) = -45 - 3 + 20 = -28.
Therefore, the answer is a. -28.
