A parabola can be represented by the equation x2 = –20y. What are the coordinates of the focus of the parabola?

(–5,0)
(5,0)
(0,5)
(0,–5)

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step-by-step explanation:

since we know that the two functions are equal, f (x) = g

(x), therefore when we equate the two equations the result should be similar to

3x = x – 4:

a. f(x) = 3x, g(x) = x – 4

equating the two functions:

3x = x – 4             (correct)

so we now got our answer (a)