Need Help Math 2 (Image)

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

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Which equation represents the function on the graph?