If (m, 1) is on a circle with center (8, 1) and radius 7, what is a value of m?

a)m=1
b)m=-1
c)m=14
d)m=-8=-+sqrt33

Icould really use some with this question.

Sasha delivers newspapers to subscribers that live within a 4 block radius of her house. sasha's house is located at point (0, -1). points a, b, c, d, and e represent the houses of some of the subscribers to the newspaper. to which houses does sasha deliver newspapers?

If m_b=mzd= 43, find mzc so that quadrilateral abcd is a parallelogram o 86 137 o 129 43 description