angela records the time and the number of miles driven during each leg of a road trip. she plots the data on a scatter plot and determines the the correlation coefficient for the line of best fit is 0.917

Icould really use some with this question.

Solve for x: 5/3 x = 20/21 it's fraction. remember to simplify your fraction

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.