20 points math test

Adam plans to choose a video game from the section of the store where everything is 75% off. he writes the expression d-0.75d to find the sale price of the game if the original price is d dollars. gena correctly writes another expression, 0.25d, that will also find the sale price of the game if the original price is d dollars. use the drop down menus to explain each part of adams and rena's expression

Don't know how to find x given these segment lengths

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.