Answer:
V = 14 + 5t
14 + 5t ≥ 49
Lucy has to add water at least for 7 minutes.
Step-by-step explanation:
There were 14 liters of water in Lucy's fish tank. She was about to add water at the rate of 5 liters per minute until there were at least 49 liters of water in the tank.
If t represents the number of minutes she adds water and V is the volume of water in liters in the fish tank, then we can write the equation as
V = 14 + 5t ........... (1)
Now, this volume of water in the tank V must be at least 49 liters.
So, 14 + 5t ≥ 49 is the required inequality.
⇒ 5t ≥ 35
⇒ t ≥ 7
So, Lucy has to add water at least for 7 minutes. (Answer)
Answer:
27
Step-by-step explanation:
f(8) means plug 8 in for x
The question is asking you to find the axis of symmetry, which is the x-value of the vertex. In order to do that you need to factor the function to find the zeros and add the zeros together and divide by two to find the axis of symmetry.
y=-16x^2+608x
y=-16x(x-38)
Zeros: x=0 and x=38
38/2=19
Therefore it takes 19 seconds for the projectile to reach its maximum height.
Hope this helps!
Answer: x^2 + 5x = 0
Work: x(x + 5)
x(x) + x(5)
x^2 + 5x
