Identify the vertex of y=-1(x-4)^2+9 and tell whether it’s a minimum or maximum

B. (4,9), maximum

Step-by-step explanation:

The given function is

This function is of the form;

where (h,k)=(4,9) is the vertex.

and since 'a' is negative the vertex is the maximum point on the graph of this function.

The correct answer is B

option B

Step-by-step explanation:

Given the quadratic equation , you can use the formula to find the x-coordinate of the vertex of the parabola:

Simplify the quadratic equation. Remember that:

Then:

Substituting:

The y-coordinate is:

The vertex is at (4,9) therefore it is a maximum.

answer: 21$

step-by-step explanation:

$42 / $14 = 3   (ratio 3: 1)

$7 x 3 = $21

4

step-by-step explanation: