Which of the following equations is of a parabola with a vertex at (1, 2)?
y = (x - 1) 2 - 2
y = (x - 1) 2 + 2
y = (x + 1) 2 - 2
y = (x + 1) 2 + 2

Option 2nd is correct that is

Step-by-step explanation:

We have given  the vertices of a parabola

General equation of parabola is:

Here, (h,k) is vertex of the parabola

Here, h=1  and k=2 and a=1

On substituting the values in the general equation of the parabola we get:

Therefore, option 2nd is correct.

3 ft

step-by-step explanation:

since the triangle is right use pythagoras' identity to solve for a

the square on the hypotenuse is equal to the sum of the squares on the other two sides, that is

a² + 8² = ( )²

a² + 64 = 73 ( subtract 64 from both sides )

a² = 9 ( take the square root of both sides )

a = = 3

-2

7 - 9 = -2

reversed:

-2 + 9 = 7