<h3>
Hello!</h3>

In order to find the vertex of a parabola, we use the following formula:

Remember, a parabola looks like so:

Now we know what a and b stand for.
In this case, b is -4, and a is -1:

Simplify:

Divide:


<h3>Notes:</h3>
- Hope everything is clear.
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- Enjoy your day!
- Always remember: Knowledge is power!
<h3>Answered by:</h3>

Answer:
<h2>
d = (4 x 180) - (3 x 90) = 450</h2>
Step-by-step explanation:
d = (4×180) - (3×90)
d = (720) - (270)
d = 720 - 270
d = 450
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Answer:
Step-by-step explanation:
640 calories
Median would be 8.. not sure about the mode though considering there are no repeating numbers..