Dash collects data on the hair lengths of a random sample of seventh-grade boys in his school. The data are clustered between and inches and between and inches. Dash can infer from the data that seventh-grade boys in his school have both short and long hair.

Which statement explains how you could use coordinate geometry to prove that quadrilateral abcd is a parallelogram? -5 -4 -3 -2 -1 t 1 2 3 4 prove that all sides are congruent and have slopes that are opposite reciprocals prove that segments ad and ab are congruent and parallel prove that opposite sides are congruent and have equal slopes prove that segments bc and cd are congruent and parallel

What does the relationship between the mean and median reveal about the shape of the data

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15