Una urna contiene 13 bolas negras, 12 rojas y 7 blancas. ¿cual es el meno numero de extracciones para tener la certeza que hay a lo menos de cada color

Drag the tiles to the boxes to form correct pairs. not all tiles will be used. match each set of vertices with the type of quadrilateral they form.

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

Find the y-intercept and x-intercept for the equation 5x-3y=60 what is the y-intercept