Which set of ordered pairs represents a function? {(3,3), ( –9,-1), (-4,3), (3,1)} {(2,4), (2,9), (2,8), (7,5)} {(6,4),(-3, -6).(-3,9).(-8, - 7)} {(5,9), (-6,1),(6,5),(-8,5)}

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%