Using quadratic function concepts, it is found that Abby made a mistake on the coordinates of the vertex, which are (-4,1).
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- A quadratic function is defined by:

- The y-intercept is given by point:

- The vertex is given by:
. - The axis of symmetry is:

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The function given is:

- Which is a quadratic equation with:
.
, thus, the y-intercept is (0, -15).

- Thus, the <u>x-coordinate of the vertex</u> is x = -4, which is the same as the <u>axis of symmetry</u>.

- The vertex is given by: (-4,1).
A similar problem is given at brainly.com/question/14680175
Answer:
30
It's thirty because median is the middle of all numbers, and thirty is the middle of all numbers.
Answer:
i think its the last one
Step-by-step explanation:
<span>Given
numbers 12.6, 3.1 and 5.4
=> 12.6
=> 3.1
=> 5.4
These 3 are all smaller than 20.
Explain why is it greater than 20?
Very simple, simply add those given numbers
=> 12. 6 + 3.1 = 15.7
=> 15.7 + 5.4 = 21.1
=> 21.1 > 20 , 20 is less than 21.1
That’s that reason why the given numbers is greater than 20. When you add the 3
numbers, the sum is greater than 20.</span><span>
</span>