Answer:
1) is equivalent multiply by 6
2) is equivalent multiply by 2 to 5/2
The answer is B. That is not a valid way to sample as it is not randomly selected.
<h2><u>Corect option</u> :</h2>

<h2><u>Answer with steps</u> :</h2>
Quantity of water she needs 
Number of servings she needs = 10
Number of cups of water she will need :



Thus, she needs
of water.
Therefore, the correct option is 
Take a ruler and put it on your desk and mesure from the centimeter side!!
We can start by figuring out the axis of symmetry.
y = x² + 12x = x (x + 12)
So roots are x = -12 or 0
Therefore axis of symmetry is x = (-12 + 0) / 2 = -6
We got x-coordinate of vertex. Now plug in x=-6 to solve for y.
y = (-6)² + 12(-6) = 36 - 72 = -36
Therefore vertex is (-6, -36).