Answer: -30
Step-by-step explanation:
If lines through XY and YW form a 90° angle, so that Y is a right angle,
then the product of the slopes of the lines through XY and YW must be -1
let the slopes through X,Y and Y,W be

and

respectively
so




Right answer:
twenty hundretdths is what I assume the answer is
B
Because 2 sqrt5 is = to sqrt 20.
4^2=16, 6^2=36
Answer:
B
Step-by-step explanation:
X is the domain.
The function comes from -∞ and goes to ∞
So B is the answer.