Which of the following are the coordinates of the vertex of y = −x2 + 2x + 1? (2, 1) (1, –2) (1, 2) (–2, 1)

C

Step-by-step explanation:

We want to determine the vertex of the quadratic equation:

Recall that the vertex is given by the formulas:

In this case, a = -1, b = 2, and c = 1.

Determine the x-coordinate of the vertex:

To determine the y-coordinate, evaluate the function at x = 1:

In conclusion, the vertex of the quadratic equation is (1, 2).

Hence, our answer is C.

step-by-step explanation:

subtract 7, so the answer is x < = 3, or c.

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.