4 people can dig a hole in 3 hours. How long does it take 9 people.
2 answers:
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Answer:
Axis of symmetry: x=-2
Maximum point: (-2,8)
Step-by-step explanation:
The given function is .
We can complete the square to reveal the axis of symmetry and the vertex.
We factor to get:
We add the zero pairs and obtain a perfect square:
The function is now in the form , where V(h,k) =(-2,8) is the vertex.
The absolute value of a quantity is 5 if that quantity is either 5 or -5.
So, the two solutions are
Now, there is a bit of ambiguity here: we are not told who and
are exactly, and yet the value of
depends on our choice.
If we choose a = 2 and b = -3, then the value of a-b is 5
If we choose a = -3 and b = 2, then the value of a-b is -5