Aparabola 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)

Anyone know? will mark brainliest if correct!

How do you convert 1.27 to a percentage

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.