Answer:
Step-by-step explanation:
Answer:
The answer is 3.
Step-by-step explanation:
Answer:
Let's complete the square first.
y = x² + 6x + 3
= (x² + 6x + 9) - 6
= (x + 3)² - 6
Therefore, the vertex is (-3, -6) and since the coefficient of (x + 3)² is positive, the vertex is a minimum.
Answer:
5) the answer is 2 hours
Step-by-step explanation:
1 hour: 35% is destroyed
35% added 2 times (2 hours) equals 70%