Question

If (m, −3) is on a circle with center (2, −3) and radius 7, what is a value of m?

Answer 1

Ok so
distance from (m,-3) to (2,-3) is 7 units

since the y value is the same, we don't even need to use distance formula

see how far 7 units from 2 is
-5 or 9
m can be -5 or 9
the point can be (-5,-3) or (9,-3)