Please help I'm very confused on this

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

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

Empty box + box + empty box fill in the box is equal to 30 how