20 points pls help. Working alone, Ryan can dig a 10 ft. by 10 ft. hole in five hours. Castel can dig the same hole in six hours. How long would it take them if they worked together?

2.72 hours

Step-by-step explanation:

Ryan digs 1/5 hole per hour

Castel digs 1/6 hole per hour

together they dig 1/5+1/6=11/30 holes per hour

11/30/hr divide by 11 to find out 1/30 of a hole per hour

1/30 and multiply by 30 to get a complete hole

1 hole=30/11=2.72 hours

Sorry, I can't move the boxes around

the answer is (4,3)

since the rule for r0, 90º is (-y,x) and it was already applied to form the image, all you have to do is reverse the answer using this formula.

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.