Answer:
36
Step-by-step explanation:
The maximum height is the y-coordinate of the vertex
given a quadratic in standard form : ax² + bx + c : a ≠ 0
then the x-coordinate of the vertex is
= - 
y = - x² + 20x - 64 is in standard form
with a = - 1, b = 20 and c = - 64, hence
= -
= 10
substitute x = 10 into the equation for y
y = - (10)² + 20(10) - 64 = 36 ← max height
Answer:
1: Is a function
2: Isnt a function
3: Is a function
4: Isnt a function
Reminder: Functions CAN"T have the same x values but different y values!!!!
Have a great day!!
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<span>
<u><em>Answer:</em></u>Each brother gets </span>

<span> of a sandwich
<u><em>Explanation:</em></u>We know that the total number of sandwiches is 2 and that the number of brothers is 3.
Since we are given that the sandwiches will be divided equally among the three brothers, this means that each will get an equal share.
Therefore, to get the share of each, we will simply <u>divide the number of sandwiches by the number of brother</u>s as follows:
each one will get = </span>

=

<span> of a sandwich
Hope this helps :)</span>