What is the interval notation for the compound inequality? x≤−4 or x≥5 (−∞, −4) or (5, ∞)
(−∞, −4] or [5, ∞)
(−4,5)
[−4,5]

(-∞, -4] or [5, ∞)

Step-by-step explanation:

Because the solutions for x can also be equal to -4 and 5, brackets are used.

And because the solutions for x can be any number less than -4 or any number greater than 5, -∞ and ∞ are used respectively.

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

step-by-step explanation:

(picture explains)