Answer:
4
Step-by-step explanation:
because you subtract it.
We are given an equation:

This is an equation of a circle. General form of a circle equation is:

Where:
a = x coordinate of a center
b = y coordinate of a center
r = radius of a circle
Motion detector can detect person anywhere within a boundary. The greatest distance at which detector can detect is at the edge of a circle. That distance, between detector and edge of circle, is equal to radius.
From the equation we have:

The greatest distance at which person can be detected is 4ft.
I hope this helps!! Don’t mind the 20 mph at the top. That was from another problem I was helping someone else on.
Answer:
1 is b and 2 is a
Step-by-step explanation:
Answer:
in the intersection region of all the solution in the system.