Answer:
b
Step-by-step explanation:
Answer: Assume c = 0
Step-by-step explanation:
Step-by-step explanation:
Assume c = 0
Using the formula for the x-coordinate of the vertex, b can be calculated in terms of a:
B can then be substituted into the quadratic equation, along with the coordinates of the vertex, to solve a:
AND
Substituting into the quadratic equation:
Because a is negative, the parabola opens up.
You don’t know well I will help you out first
one half = 
If Mrs. Marina is going to make one half of the recipe, then she needs

Answer: Mrs. Marina needs
of sugar to make one half of recipe.