Hello :
<span>f(x)=x²+4x-5
</span><span>The axis of symmetry for a function in the form f(x)=x^2+4x-5 is x=-2 :
</span>f(x) = (x+2)² + b
f(x) x²+4x+4+b= x² +4x-5
4+b= -5
b = -9
the vertex is : (2 , -9)
<span>The answer is true
Let's imagine that we have the following function function:
</span>

<span>We have to:
Independent variable: x
Dependent variable: y
For x = -1:
</span>

<span> For x = 1:
</span>

<span> We observe that the independent variable can only obtain one result.
Answer:
True</span>
This is probably the answer I’m not 100% sure
Answer: Together the pool can be drained in 2 hours and 18 minutes.