Answer
See below:
Work Step by Step
A)
$$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$$
B) $$(x_m,y_m)=(\frac{x_2+x_1}{2},\frac{y_2+y_1}{2})$$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter 1, Equations and Graphs - Chapter 1 Review - Concept Check - Page 168: 2
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