Answer:
The equation has a maximum value with a y-coordinate of -21.
Step-by-step explanation:
Given

Required
The true statement about the extreme value
First, write out the leading coefficient

means that the function would be a downward parabola;
Downward parabola always have their vertex on top of the parabola and as such, the function has a maximum value.
The maximum value is:

Where:

So, we have:



Substitute
in 


<em>Hence, the maximum is -21.</em>
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➷ -22.5 - (-18) = -4.5
-27 - (-22.5) = -4.5
The common difference is 4.5
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Answer: x = 13.5
3/4 = x/18
⇔ x = 3/4 .18 = 27/2 = 13.5
Step-by-step explanation:
6 = 12/2
8 = 24/3
4 = 16/4
3 = 18/6
1 = 9/9
5 = 25/5
Answer: The answer is −6p^2-23p-20