Write y=x^2+4x-5 in vertex form. then identify the vertex.

the vertex form is (x+2)^2 - 9 and the vertex is (-2, -9)

Vertex Form: y = (x+2)^2 - 9

Vertex : (-2,-9)

Step-by-step explanation:

First, we need to use the -b/2a formula to find the x value or the axis of symmetry.

-4/2 = -2

Now we have that, we have our x-coordinate. Now we need to find our y variable. We have to plug the x value into the equation.

-2^2 + 4(-2) - 5

+ 4 - 8 - 5

- 4 - 5

-9

Now that we have our coordinates, we have our vertex.

(-2,-9)

Now we have to convert it to vertex form.

Vertex Form: y = a(x-h)^2 + k

y = 1(x--2)^2 + (-9)

y = 1(x+2)^2 - 9

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

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