a jar contains 3 blue marbles 8 red marbles 4 white marbles and 5 purple marbles suppose you pick one marble at random without looking. find the probability of each event. write your answer as a fraction in simplest form. p(blue or red) ​

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a

The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is

The mean finish time was 185.52 with a standard deviation of 0.327 minute. the winning car driven by chris finished in 185.13. the previous year race had a mean finish time of 110.3 with a standard deviation of 0.106. the winning car that year driven by karen finished in 110.13 minutes. find their respective z-scores. chris - z-score karen “- z-score