Answer: OPTION D.
Step-by-step explanation:
The vertex form of a quadratic function is:

Where (h, k) is the vertex of the parabola and "a" is the coefficient of the squared in the parabola's equation.
We know that the vertex of this parabola is at (5,5) and we also know that when the x-value is 6, the y-value is -1.
Then we can substitute values into
and solve for "a". This is:
Answer:

Step-by-step explanation:

Step-by-step explanation:
8x-9=5x-3
Move any equation to the opposite side. I'll use the left this time


move 6 to opp side



The correct answer would be 3, if im not mistaken