Answer:
there doesnt seem to be much information, but from what it looks like it looks like it is 20?
Step-by-step explanation:


and,

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☆Find the 

Here,
BC =AC
so,
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we know that,

But
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so..







But...

soo,


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Answer:
a. Vertex = (2.5,-12.25)
b. y-intercept = (0,-6)
c. x-intercept = (6,0) ; (-1,0)
Step-by-step explanation:
a.
Your equation is written as:

The easiest way to find the vertex is writing the equation this way:

Being the vertex (h,k)
So first complete the square

Vertex : (2.5,-12.25)
b.
To find the y-intercept you need to replace the equation when x = 0 and get y

c.
To find the x-intercept you need to replace the equation when y = 0 and get x

Answer:
In the picture
Step-by-step explanation:
Hope that helps.