Answer:
{x: x ∈ ℝ, x ≥ 0}
Step-by-step explanation:
The relation is only defined for non-negative values of x, so that is what the domain consists of: real numbers greater than or equal to zero.
Answer:
-4and1/8
Step-by-step explanation:math
Answer: 4
<u>Step-by-step explanation:</u>
Inversely proportional means xy = k, where k is the constant of proportionality
First, find k when x = 2 and y = 400 ----> 2(400) = k --> 800 = k
Then, find y when x = 200 (knowing that k = 800)
200y = 800
y = 4