It would be (4, 5) because add the 2nd and third than you get (4, 5)
Answer:
vertex is (4,-25)
Step-by-step explanation:

To find out the vertex we use formula

From the given f(x), the value of a=1, b=-8 and c=-9
Plug in the values in the formula

x=4
Now find the value of y
plug in 4 for x in f(x)

The value of y is -25
The vertex is (4,-25)
The subtraction equation that represents the problem is ( h-477)metres
<h3>Subtraction problem</h3>
Given the following information
- The original height of the helicopter = h meters
If the traffic helicopter descends to hover 477 meters above the ground, then the original height of the helicopter will be:
Original height = h - 477 (Since it is descending)
Hence the subtraction equation that represents the problem is ( h-477) meters
Learn more on subtraction problem here brainly.com/question/220101
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