The National Research Council recommends keeping a 1:3, colon, 3 copper to zinc ratio in a horse's diet. If the horse is getting
420 milligrams (\text{mg})(mg)left parenthesis, start text, m, g, end text, right parenthesis of zinc per day, how many milligrams of copper does the Council recommend the horse have?
1 answer:
You might be interested in
Answer:
<em>The coordinates of the vertex are (-1,-4).</em>
Step-by-step explanation:
<u>Equation of the Quadratic Function </u>
The vertex form of the quadratic function has the following equation:
Where (h, k) is the vertex of the parabola that results when plotting the function, and a is a coefficient different from zero.
We are given the function:
We must transform the equation above by completing squares:
The first two terms can be completed to be the square of a binomial. Recall the identity:
Thus if we add and subtract 1:
Operating:
The trinomial in parentheses is a perfect square:
Adding 4:
Comparing with the vertex form of the quadratic function, we have the vertex (-1,-4).
The coordinates of the vertex are (-1,-4).