The table below shows the probability distribution of student ages in a high school with 1500 students. What is the expected value for the age of a
randomly chosen student?
14
15
16
17
18
Age
13
Probability 0.01
0.27 0.30 0.25 0.16 0.01

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.