Answer:

Step-by-step explanation:
Vertex form of a quadratic equation;

Vertex of the parabolas (h, k)
The vertex of the parabola is either the minimum or maximum of the parabola. The axis of symmetry goes through the x-coordinate of the vertex, hence h = -3. The minimum of the parabola is the y-coordinate of the vertex, so k= 7. Now substitute it into the formula;

Now substitute in the given point; ( -1, 9) and solve for a;

Hence the equation in vertex form is;

In standard form it is;

Answer:
Evaluate each expression for a = 4, b = 2, and c = 5.
c − a
Answer:
4x+3y+62
Step-by-step explanation:
the other variables wouldnt be able to do anything to 62 because they are different variables.
50÷8.5 = 5.88 but since we can’t have .88 of a person the answer would be five T-shirts