Answer:
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
Given
f(x) = - 9(x + 5)² + 4 ← expand parenthesis using FOIL
= - 9(x² + 10x + 25) + 4 ← distribute parenthesis by - 9
= - 9x² - 90x - 225 + 4 ← collect like terms
= - 9x² - 90x - 221 ← in standard form
Our original equation:

Now, we just solve for k:
When we use PEMDAS, we get this equation:

Now, subtract 248 from both sides:

Now, divide -4 on both sides:

The answer to your problem is
k = 58.5 or k = 117/2. Hope this helps and have a fantastic day!
Step-by-step explanation:
are you doing iready? well the answer is 5 then they already answered 10 so the 15 then 20