Find the slope through these two points

Which statement accurately explains whether a reflection over the y axis and a 270° counterclockwise rotation would map figure acb onto itself?

6. sarah saved $12.75 every week for a number of weeks, w. she received an additional $25 during the last week in which she saved money. write and solve an equation to find the number of weeks, w, for which sarah had saved money if she has $114.25 now.

Aproduction process manufactures electronic components with timing signals whose duration follows a normal distribution. a random sample of 10 components was taken, and the durations of their timing signals were measured. a. the probability is 0.05 that the sample variance is bigger than what percentage of the population variance? b. the probability is 0.10 that the sample variance is less than what percentage of the population variance?